I could only guess at your view, but possibly God the Father in the centre, God the Son on the right hand, and God the Holy Spirit on the left. Turning then to the right and then the left, and thus excluding the angels, God the Father invites his other two persons of the Godhead to create man.
Here is my view. There is only "One" sitting on the "throne of God and of the Lamb":
"And there shall be no more curse: but the throne of God and of the Lamb shall be in it; and his servants shall serve him: And they shall see his face; and his name shall be in their foreheads" (Rev.22:3-4).
There is only One sitting on the throne of God and of the Lamb and here is what the One on the throne said:
"And he that sat upon the throne said, Behold, I make all things new. And he said unto me, Write: for these words are true and faithful. And he said unto me, It is done. I am Alpha and Omega, the beginning and the end. I will give unto him that is athirst of the fountain of the water of life freely. He that overcometh shall inherit all things; and I will be his God, and he shall be my son" (Rev.21:5-7).
As you admit, only God can be described as being the
Alpha and the Omega, the beginning and the end. And from what John said at Revelation 22:20 the following words are spoken by the Lord Jesus:
"And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be. I am Alpha and Omega, the beginning and the end, the first and the last" (Rev.22:12-13).
Common sense dictates that since only God can be described as the
Alpha and the Omega, the beginning and the end then we can know with full assurance that the Lord Jesus is God. And the Holy Spirit is described this way:
"And he shewed me a pure river of water of life, clear as crystal, proceeding out of the throne of God and of the Lamb" (Rev.22:1).