as are zebras, chains, white eyes, and goldens i think
as for coral fish.. i did just list a few.. the problem is any fish under 5'' will immediately be considered food and any 5-8'' he'll prolly still try to eat.. once grown of course
some thing like:
1-2 lions
lunare wrasse
snowflake
miniatus, polleni, etc grouper
maybe a group of chromis or schooling bannerfish
something along those lines would be really interesting i think