@Slim,
Great array of scriptures.
Yes the pattern is to give thanks to God through Christ.
The point is that Jehovah's Witnesses are not permitted to have a personal relationship with Christ or even to express their gratitude or praise directly to him.
13¶And every creature which is in heaven, and on the earth, and under the earth, and such as are in the sea, and all that are in them, heard I saying, Blessing, and honour, and glory, and power, be unto him that sitteth upon the throne, and unto the Lamb for ever and ever. Revelation 5:13
The truth is Jesus invites us into fellowship with Himself. He says,"Come unto me, all ye that are weak and heavy laden and I will give you rest.
Our fellowship is with the Father and the Son. Knowing both the Father and the Son means eternal life. Jn.17:3 And no one can know the Father unless the Son reveals Him to the sinner.
Jesus will say "Depart from me" to those He does not know and who do not know Him. One can have lots of facts about Jehovah and Jesus without ever coming to him or serving him.
Eternity depends on knowing the one who alone can reveal the Father to us.
And btw when we give thanks to Jesus, we glorify God. Luke 17: