That he is in heaven in a superior position to the angels is not disputed.
John 10:30-34
30 I and the Father are one."
31Again the Jews picked up stones to stone him, 32but Jesus said to them, "I have shown you many great miracles from the Father. For which of these do you stone me?"
33"We are not stoning you for any of these," replied the Jews, "but for blasphemy, because you, a mere man, claim to be God."
Even the Jews knew that Jesus said He was God.
Your question does not make sense because it is based on a category error. If you asked where does the Bible teach that Christ is the same NATURE (or essence) as God at least your question would make sense. As it is, though, your use of the word "person" here is incoherent because you are confusing the Divine Persons and dividing the indivisible nature of Deity.
The Greek word theotetos, used of Christ in Colossians 2:9 is one of many, many places in Holy Scripture that teach the absolute Deity of Christ. The word means, "the state of being God". In other words, the verse is saying that whatever it is that makes God God, in all its completeness, Christ is in human form.
There are so many other irrefutable proofs of Christ's Deity in Scripture that one has to twist Scripture beyond recognition to deny this truth.
Cordially,
WhatEVER they say; it was enough to get JESUS killed.
His JUDGES sure thought that He equated Himself with GOD.