There shouldn't be much of an aggression issue with the bellus. The tangs will probably show some aggressiveness.In my 135 gallon I have a Yellow tang, a Whitetail bristle tooth, and a Bellus angel fish. I would like to add either a Gold Flake Angel or a Majestic Angel or maybe even a Scribbled or a Blue line Angel ( have not made my mind up yet). Is there any concern with aggression with the Bellus? Whichever I choose, it will be sub adult sized (2 to 3" max) and my Bellus is about 4" at this time.
The goldflake and scribbled will be fine in that size tank. The majestic and blueline are eventually going to be borderline to big.