Indeed, on this particular one seated on the White Horse, it is very unclear as to his identity.
Ideas are all over the map. Unlike the certain identity of the one seated on the white horse in the earlier chapters as well as Chapter 19 (clearly Christ), no one can be certain here. It takes humilty to state "I don't know". That is something the JWs just don't understand.
Here are how various translations render the verse, and what various commentators have to state about the identity of this one:
International Standard Version (©2008)
Then I looked, and there was a white horse! Its rider had a bow, and a victor's crown had been given to him. He went out as a conqueror to conquer.
New American Standard Bible (©1995)
I looked, and behold, a white horse, and he who sat on it had a bow; and a crown was given to him, and he went out conquering and to conquer.
GOD'S WORD® Translation (©1995)
Then I looked, and there was a white horse, and its rider had a bow. He was given a crown and rode off as a warrior to win battles.
King James Bible
And I saw, and behold a white horse: and he that sat on him had a bow; and a crown was given unto him: and he went forth conquering, and to conquer.
American King James Version
And I saw, and behold a white horse: and he that sat on him had a bow; and a crown was given to him: and he went forth conquering, and to conquer.
American Standard Version
And I saw, and behold, a white horse, and he that sat thereon had a bow; and there was given unto him a crown: and he came forth conquering, and to conquer.
Bible in Basic English
And I saw a white horse, and he who was seated on it had a bow; and there was given to him a crown: and he went out with power to overcome.
Douay-Rheims Bible
And I saw: and behold a white horse, and he that sat on him had a bow, and there was a crown given him, and he went forth conquering that he might conquer.
Darby Bible Translation
And I saw: and behold, a white horse, and he that sat upon it having a bow; and a crown was given to him, and he went forth conquering and that he might conquer.
English Revised Version
And I saw, and behold, a white horse, and he that sat thereon had a bow; and there was given unto him a crown: and he came forth conquering, and to conquer.
Webster's Bible Translation
And I saw, and behold, a white horse: and he that sat on him had a bow; and a crown was given to him: and he went forth conquering, and to conquer.
Weymouth New Testament
And I looked and a white horse appeared, and its rider carried a bow; and a victor's wreath was given to him; and he went out conquering and in order to conquer.
World English Bible
And behold, a white horse, and he who sat on it had a bow. A crown was given to him, and he came forth conquering, and to conquer.
Young's Literal Translation
and I saw, and lo, a white horse, and he who is sitting upon it is having a bow, and there was given to him a crown, and he went forth overcoming, and that he may overcome.
Geneva Study Bible
And {2} I saw, and behold a white horse: and he that sat on him had a bow; and a crown was given unto him: and he went forth conquering, and to conquer.
(2) The first sign, joined with a declaration, is that because of the sins and horrible rebellion of the world, God will invade the world: and first of all will suddenly, mightily, and gloriously, as if with arrows of pestilence from a distance, beat down the same as Judge, and triumph over it as conqueror.
People's New Testament
6:2 And I saw, and behold, a white horse. Let the reader note particularly what John saw, and then remember that it is symbolical, and that instead of looking for a literal fulfillment, we are to ask the meaning of the symbols. There are several features of the vision that fix our attention: (1) The horse; (2) his white color; (3) the armed warrior; (4) his crown; (5) his bow; (6) his mission. It is certain that none of these features would have been named if they did not possess a significance. What do each of these symbols mean? I will consider them in order:
(1) THE HORSE. He was never used by the Jews or Orientals as a beast of burden. The ox and the ass were devoted to that office, and the horse was reserved for war. Whenever the horse is mentioned by the prophets it will be found in connection with warlike employments. That the horse is always associated with war can be seen by consulting Job 29:25 Ps 76:6 Pr 21:31 Jer 8:6 Eze 26:10. Hence this symbol points to a period of war, though it alone does not declare whether the conflict is carnal or spiritual, is triumphant or disastrous.
(2) THE WHITE COLOR. As there are three more horses in succession under the three following seals, each of different colors, the color must have a meaning. White must have a different significance from red, or black, or pale. What is indicated by the color of the first horse? White is the color of prosperity, of happiness, and triumph. Whenever a Roman General was given a triumph his chariot was drawn by milk-white horses. In Re 19:11 the Mighty Conqueror who wears many crowns is seen riding on a white horse. Commentators are agreed that the white horse signifies prosperous, victorious wars.
(3) THE RIDER. His significance is due to his arms, his crown, and the white horse he rides. It is enough to state here that he represents either some conqueror, or a conquering age.
(4) THE CROWN. A crown was given to him. This crown is not the diadem ( diadema ) but the garland crown ( stephanos ). The last was the crown given as a reward for victory in battle, for great achievements or for victory in games. The Hero of chapter 19 wears many diadems, kingly crowns (Re 19:12), but this rider wears the garland crown, the stephanos. It is important to note this distinction.
(5) THE BOW. He is armed with a usual weapon of war in that age. The bow may signify that the rider is a great, warlike figure, or there may be a special significance in the fact that he is armed with a bow instead of a sword or spear.
Wesley's Notes
6:2 And I saw, and behold a white horse, and he that sat on him had a bow - This colour, and the bow shooting arrows afar off, betoken victory, triumph, prosperity, enlargement of empire, and dominion over many people. Another horseman, indeed, and of quite another kind, appears on a white horse, Rev 19:11. But he that is spoken of under the first seal must be so understood as to bear a proportion to the horsemen in the second, third, and fourth seal. Nerva succeeded the emperor Domitian at the very time when the Revelation was written, in the year of our Lord 96. He reigned scarce a year alone; and three months before his death he named Trajan for his colleague and successor, and died in the year 98. Trajan's accession to the empire seems to be the dawning of the seven seals. And a crown was given him - This, considering his descent, Trajan could have no hope of attaining. But God gave it him by the hand of Nerva; and then the east soon felt his power. And he went forth conquering and to conquer - That is, from one victory to another. In the year 108 the already victorious Trajan went forth toward the east, to conquer not only Armenia, Assyria, and Mesopotamia, but also the countries beyond the Tigris, carrying the bounds of the Roman empire to a far greater extent than ever. We find no emperor like him for making conquests. He aimed at nothing else; he lived only to conquer. Meantime, in him was eminently fulfilled what had been prophesied of the fourth empire, Dan 2:40, 7:23, that he should devour, tread down, and break in pieces the whole earth.
Scofield Reference Notes
Margin a white horse
See, Zech 6:3, cf. Christ in Rev 19:11 whom the Beast imitates.
Jamieson-Fausset-Brown Bible Commentary
2. Evidently Christ, whether in person, or by His angel, preparatory to His coming again, as appears from Re 19:11, 12.
bow-(Ps 45:4, 5).
crown-Greek, "stephanos," the garland or wreath of a conqueror, which is also implied by His white horse, white being the emblem of victory. In Re 19:11, 12 the last step in His victorious progress is represented; accordingly there He wears many diadems (Greek, "diademata"; not merely Greek, "stephanoi," "crowns" or "wreaths"), and is personally attended by the hosts of heaven. Compare Zec 1:7-17; 6:1-8; especially Re 6:10 below, with Zec 1:12; also compare the colors of the four horses.
and to conquer-that is, so as to gain a lasting victory. All four seals usher in judgments on the earth, as the power which opposes the reign of Himself and His Church. This, rather than the work of conversion and conviction, is primarily meant, though doubtless, secondarily, the elect will be gathered out through His word and His judgments.
Matthew Henry's Concise Commentary
6:1-8 Christ, the Lamb, opens the first seal: observe what appeared. A rider on a white horse. By the going forth of this white horse, a time of peace, or the early progress of the Christian religion, seems to be intended; its going forth in purity, at the time when its heavenly Founder sent his apostles to teach all nations, adding, Lo! I am with you alway, even to the end of the world. The Divine religion goes out crowned, having the Divine favour resting upon it, armed spiritually against its foes, and destined to be victorious in the end. On opening the second seal, a red horse appeared; this signifies desolating judgments. The sword of war and persecution is a dreadful judgment; it takes away peace from the earth, one of the greatest blessings; and men who should love one another, and help one another, are set upon killing one another. Such scenes also followed the pure age of early Christianity, when, neglectful of charity and the bond of peace, the Christian leaders, divided among themselves, appealed to the sword, and entangled themselves in guilt. On opening the third seal, a black horse appeared; a colour denoting mourning and woe, darkness and ignorance. He that sat on it had a yoke in his hand. Attempts were made to put a yoke of superstitious observances on the disciples. As the stream of Christianity flowed further from its pure fountain, it became more and more corrupt. During the progress of this black horse, the necessaries of life should be at excessive prices, and the more costly things should not be hurt. According to prophetic language, these articles signified that food of religious knowledge, by which the souls of men are sustained unto everlasting life; such we are invited to buy, Isa 55:1. But when the dark clouds of ignorance and superstition, denoted by the black horse, spread over the Christian world, the knowledge and practice of true religion became scarce. When a people loathe their spiritual food, God may justly deprive them of their daily bread. The famine of bread is a terrible judgment; but the famine of the word is more so. Upon opening the fourth seal, another horse appeared, of a pale colour. The rider was Death, the king of terrors. The attendants, or followers of this king of terrors, hell, a state of eternal misery to all who die in their sins; and in times of general destruction, multitudes go down unprepared into the pit. The period of the fourth seal is one of great slaughter and devastation, destroying whatever may tend to make life happy, making ravages on the spiritual lives of men. Thus the mystery of iniquity was completed, and its power extended both over the lives and consciences of men. The exact times of these four seals cannot be ascertained, for the changes were gradual. God gave them power, that is, those instruments of his anger, or those judgments: all public calamities are at his command; they only go forth when God sends them, and no further than he permits.