Actually the WTS teaches:
Congregation of God = 144,000 only
*** WT Index 86-05 CONGREGATION OF GOD
(See Anointed Christians; Christian Congregation; Congregation of Israel)
*** WT Index 30-85 CONGREGATION OF GOD
(Also called 144,000; Anointed; Body of Christ; Bride of Christ; Chosen Ones; Elect; Holy Nation; Israel of God; Kingdom Class; Little Flock; New Creation; New Nation; Royal House; Royal Priesthood; Sanctuary Class; Sons of Levi; Spirit Begotten; Spiritual Israel; Spiritual Sons)
*** it-1 p. 498 Congregation ***
The Christian congregation of God took the place of the congregation of Israel at Pentecost of 33 C.E., when holy spirit was poured out on Jesus’ followers in Jerusalem. The first prospective members of that congregation were chosen shortly after Jesus’ baptism, at the beginning of his ministry on earth. (Ac 2:1-4; Joh 1:35-43) From among his early followers Jesus selected 12 apostles (Lu 6:12-16), and later he chose Saul of Tarsus, who became "an apostle to the nations." (Ac 9:1-19; Ro 11:13) The 12 faithful apostles of the Lamb Jesus Christ, including Matthias who replaced Judas, constitute secondary foundations of the Christian congregation.—Ac 1:23-26; Re 21:1, 2, 14.
This congregation is referred to as "the congregation of the firstborn who have been enrolled in the heavens," the full number of which, under Christ the head, is 144,000. (Heb 12:23; Re 7:4) These called-out ones are "bought from among mankind" to carry out a special work here on earth and then to be with Christ in heaven as his bride. As there were requirements for membership in the Hebrew congregation of God, so there are requisites for membership in the Christian "congregation of God." Those making it up are spiritual virgins who keep following the Lamb, Jesus Christ, no matter where he goes, "and no falsehood was found in their mouths; they are without blemish."—Re 14:1-5.
The members of the Christian congregation of God are selected by Jehovah. (Ro 8:30; 2Th 2:13) The first members thereof were called out from the rejected Jewish congregation, which had not accepted God’s Son as their Messiah. However, beginning with Cornelius in 36 C.E., members of the Christian congregation were also called out from the nations in general, so that Paul could say: "There is neither Jew nor Greek, there is neither slave nor freeman, there is neither male nor female; for you are all one person in union with Christ Jesus." (Ga 3:28; Ac 10:34, 35; Ro 10:12; Eph 2:11-16)
So are non-anointed JWs part of the "congregation of God"? In fact, initially, non-anointed members of the WTS weren't even JWs.
*** Proclaimers book (1993) chap. 7 p. 83 Advertise the King and the Kingdom! (1919-1941) ***
The following spring, several issues of TheWatchtower, beginning with the April 1, 1935, issue, carried this announcement: "Again TheWatchtower reminds its readers that a convention of Jehovah’s witnesses and Jonadabs will be held at Washington, D.C., beginning May 30 and ending June 3, 1935." The Jonadabs eagerly awaited the convention.
Footnote
jv sect. 1 chap. 7 p. 83 Advertise the King and the Kingdom! (1919-1941)
At that time the Jonadabs were not considered to be "Jehovah’s witnesses." (See TheWatchtower, August 15, 1934, page 249.)
It was not until eight years later, they were called that, a full 11 years after the Bible Students were given the name "Jehovah's Witnesses" by Rutherford
*** Footnote see above***
However, a few years later, TheWatchtower of July 1, 1942, stated: "These ‘other sheep’ [Jonadabs] become witnesses for Him, on the same wise that the faithful men before Christ’s death, from John the Baptist all the way back to Abel, were the never-quitting witnesses for Jehovah."