Before I get started, people need to remember there is some risk introducing any fish to your tank, as the profiles are generalities and no fish is guaranteed to behave like the norm.
I have a coral beauty angel, the only with caution fish I have. I have never witnessed it nip at any of my corals but I can tell you it can be one mean sob. It particularly likes to fight my black and white clowns, but my yellow tang is the enforcer of my tank and does keep the coral beauty in check. I do feed my tank two times a day, and hang a veggie sheet two times a week. This heavy feeding schedule may help to aid in my angel not bothering my coral, or it may be the fish. I used to keep cichlids, and I learned that well fed fish are well behaved fish so I apply the same theory to my marine tanks.