I don't know what your experience will be but:
I tried to grow out a pair of tangs in a 60g with other fish. The issue is I had about 11 fish in there (5 were chromis). The two tangs were a yellow tang and a yellow eyed kole tang. I then suddenly had to take in a few smaller firefish, cardinals, and gobies. Then boom massive ich or velvet outbreak. I have reason to believe it was velvet due to how quickly fish died but also reason to believe ich may have been present.
My suggestion is to be careful with growing out tangs in smaller tanks due to stress increasing susceptibility to ich or worse velvet.