Puffers, triggers, eels, large angels, wrasses, and tangs are typically compatible tank mates, as long as you pick the species that are not overly aggressive (such as clown or undulated trigger). How about this list?
- dog face puffer
- asfur angel or any angel from the chaetodontoplus genus
- some trigger other than clown, undulated, or queen
- zebral eel
- banana wrasse
I think that's about right in terms of stocking level. If you have a strong skimmer, you may squeeze in a powder blue tang or purple tang.