"16 who alone is immortal and who lives in unapproachable light,...

"16 who alone is immortal and who lives in unapproachable light, whom no one has seen or can see."

This is the God and Father

Let's go with that.
It contradicts this, your claim:

Are you paying attention to the highlight, "who sits on the throne" = that one is the God and Father, the one that Jesus defined as the only true God, when he was here.

Try not allow your impulsive compulsive disorder get the better of you again.