The two tangs would fight. Butterfly fish are delicate, should be left in the hands of the experts (definately not me) IMO
. The coral beauty may pick at coral if you have it or are planning on getting some. The chromis are fine. Try 5 pajama cardinals, a pinkspot goby, or another kind of goby, and a wasse.
The inch-per-gallon rule is widely out of date and is no longer used since factors such as the size of the fish, bioload, filtration, and size of tank (length, height, and width) are more important. Hope this helps. Welcome to AA!