In my experience large wrasses and triggers will literally eat ANY inverts (saddle, lunar wrasses and niger, pink tail triggers are the ones Ive kept, although the both wrasses were well over 8" when i got them) as far as lions, angels, and eels, I currently have various snails, hermits, serpent/brittle stars, chocolate chip stas, and an urchin all doing fine. note: my snowflake eel ate an emerald crab within 24 hours. As far as plants go, lions, wrasses, and triggers dont really bother caulerpas and whatnot, and the few large angels Ive kept (koran and annularis) neither would even touch any of my caulerpas either.
Jon