I have a similar situation approaching me. I'm building a 300g FOWLR and I will have angels, tangs, butterflys,a hamlet, squirrelfish, hogfish, harliquin tusk, and a minatia grouper.
the only things that I thought of that won't get munched are Urchins,
Large crustaceans (crabs and lobsters) which I don't trust with $400 + of fish, and maybe an oreaster sp. star which I may try.
So I'll tag slong and see if anyone has any ideas.