Contradiction with Philippians 2:9
Philippians 2:9 states that God has highly exalted Jesus and given Him a name above every name, which aligns rather than contradicts with the exaltation described in Ephesians 1:21.
Philippians 2:9: Wherefore God also hath highly exalted him, and given him a name which is above every name:
Contradiction with John 14:28
John 14:28 has Jesus saying that the Father is greater than He is, which contrasts with Ephesians 1:21's depiction of Jesus's supreme authority.
John 14:28: Ye have heard how I said unto you, I go away, and come [again] unto you. If ye loved me, ye would rejoice, because I said, I go unto the Father: for my Father is greater than I.
Contradiction with 1 Corinthians 15:27
In 1 Corinthians 15:27, it mentions that when all things are put under Christ, it's clear that God is excepted, indicating a distinction in supremacy compared to Ephesians 1:21.
1 Corinthians 15:27: For he hath put all things under his feet. But when he saith all things are put under [him, it is] manifest that he is excepted, which did put all things under him.
Contradiction with Matthew 28:18
Matthew 28:18 states Jesus has all authority in heaven and earth, which supports, rather than contradicts with, Jesus's authority in Ephesians 1:21.
Matthew 28:18: And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth.