Jesus came in the express image of God, that doesn't mean he is God. That means we saw the fullness of God through him all of God's love, mercy, forgiveness and he spoke every word that was from the father who is his God, Jesus was in the fullness of God in word and deed.
The head of Christ is God, so God is the Godhead, he's the head of us all, including Christ, Christ has one above him, and he's the father who is also his God and he sent him to bare witness to the truth and Christ Jesus lived by the will of his God denying his own will to bring us the truth and a perfect example for us to follow and he is now exalted by his God and set at his right hand, there's no need to be exalted if he was God already! And there's no need for him to be given authority if he is already God either, but he was, he was given authority and set above all in heaven and earth by his God! And Christ Jesus had the fullness of God bodily, he had the fullness of the Holy Spirit because he was sinless. So we saw the fullness of God bodily through Christ. It says in the Bible that God was IN Christ reconciling the world unto himself.
There is one God, and he's the father, and that is exactly what Christ Jesus says and he says that he is his God, and the apostles say that the father is the God and father of our Lord Jesus Christ, I am believing the truth, it's in the Bible clearly written!