I've had flame angels and coral beauties with no problems. That said, for every one of "me", there's gonna be another who will tell you that their angel tore their reef apart. They can do well for quite some time, then suddenly decide they want to start nipping. It's just a risk with this group of fish. You never know. As with many aspects of this hobby, sometimes you just have to give it a go and see how things play out.