They really aren't interested in corals and moreso might take interest in shrimp or hermit crabs. The main problem, other than plain ol' aggressive species, is with many triggers and their digging abilities undermining rock structures. Even the smaller triggers will get about 6-8" and built like tanks...
I would not house stonefish, very venemous. Anglers can swallow small fish and even cannibalise each other. They can also be difficult to feed, which is why many prefer a specie-specific setup. Most predatory fish are just that and why mixing such fish is problematic, but possible.