Sailfin, purple sailfin, and yellow sailfin tangs are all very hardy fish. I have a large sailfin(6+ in), yellows, and a purple which have all had ick at one time or another.
I also like powder blues(have 1) and browns. These are very difficult to maintain but I think I've been successful by feeding a well balanced diet high in macroalgae.
Another hardy tang is a Naso. I had one in Ohio and it was an awesome fish, easy to keep.
Bubba