What about a Caribbean theme: Chalk basslet (Serranus tortugarum), Blackcap basslet (Gramma melacara), Flame cardinal (Apogon sp.), Jawfish (Opistognathus sp.), and a Flameback angelfish (Centropyge aurantonotus)...You can also try Foureye butterflyfish (Chaetodon capistratus), but they will consume zoanthiids, gorgonians, and polychaetes.
Just an example of the variety you could have as most of these you would purchase several of to form small shoals.