The NT never calls God's angels 'THEOS',
By confining your statement to the NT it seems you are aware that the OT does call the angels gods in places like Ps 8.5. Why doesn’t that count?
Christ has a higher dignity than the angels, according to the beginning of chapter 1 of the letter to the Hebrews.
What Heb 1.4 says is that Jesus “became” better than the angels because he inherited a more excellent name than theirs. This makes sense if Jesus was elevated above the angels as JWs believe. On the other hand it makes no sense to talk about God himself “becoming” better than angels.
Which manuscript are you saying had a full stop in John 1.1c?