AJF-
I have a 60 gallon w/a coral beauty, orange-spotted watchman goby, P.J. Cardinal, and tomato clown. The only other fish I am thinking about adding is a bi-color blenny or midas blenny. My coral beauty has yet to nip at any of my corals (I have softies and LPS); I've had him for about 6 months now. It is definitely a good idea to have only one dwarf angel per tank, they will usually fight to the death. The royal grammas can be aggressive, too, I've heard.