Yes, Jesus said he and his Father are one at John 10:30
At John 10:36 Jesus answers as to who he is at John 10:36 the Son of God.
Jesus prays that he and his followers be ONE just as he and his Father are ONE at John 17:11; 21-23
Jesus was Not praying they all become God, but be ONE in purpose, will, goal, faith, belief, unity, agreement........
At John 10:29 Jesus believed his Father is greater than all ( everyone )
And at John 14:28 Jesus says his Father is greater than him
Again, you misunderstand the dual nature of Christ as prophesied (Isaiah 52:13-15) and which is highlighted again by the apostle Paul in Phillipians 2:6-8.
6Who, existing in the form of God, did not consider equality with God something to be grasped,
a
7but emptied Himself, taking the form of a servant, being made in human likeness.
8And being found in appearance as a man, He humbled Himself and became obedient to death—even death on a cross.
You are quoting text about the Son of Man and using those to claim Christ (God) is subserviant to God. That is simply poor theology. Even Christ calls Himself "Son of man". However, lets not forget, Isaiah also prophesied that God Himself would come die for His creation...
Isaiah 9:6&7
6For unto us a child is born,
unto us a son is given, and the government will be upon His shoulders.
And He will be called
Wonderful Counselor, Mighty God,
Everlasting Father, Prince of Peace.
7Of the increase of His government and peace there will be no end. He will reign on the throne of David and over his kingdom, to establish and sustain it with justice and righteousness from that time and forevermore. The zeal of the LORD of Hosts will accomplish this.
So now let me ask you...who was it that died for the sins of mankind, a man born of fallen corrupted humanity, or God?
And whilst you are contemplating my question above, also ask yourself...what was the charge Satan made against God in heaven? Wasnt it along the lines of God is self serving, selfish, and doesnt care?
If the charge satan made against God is to be tested on this earth, how does a selfish God answer that charge with integrity by creating somone else to die for the sins of humanity? How does that prove God is loving, all caring, or even innocent exactly?