shouldn't be a problem.
Mine aren't aggressive as such, but they will peck at anything which stays still for too long...Dwarf cichlids like Apistogrammas and rams will be fine with angelfish.
Angels are only a problem when they start breeding and because of their size. They will eat small fish but so will most other fish. And they defend a territory when breeding so in a small tank they sometimes chase the other fish away from their nesting site. As far as fish go, angels are quite peaceful but they do eat little things.