I cant think of too many big species but there are many medium sizes fish.
Flame angle - very pretty
Coral cats - around 6" and they are a good clean up crew.
Big eyed squirel fish
Mono's - They are freshwater but they can be slowly integrated to saltwater
Heniochus Butterflys - they are very cool looking but you would want to monitor them around corals
Panther and Coney Grouper - watch shrimp and small fish
Spotted or Stripped Sweetlips - Kind of hard to take care of though
Hope I helped a little. Mabey try doing a search on the net for reef safe fish.