My LFS owner swears that the Pygmy (cherub) angelfish is the most reef safe dwarf angel out there. I've never had experience with them. Most are hit or miss.
Saltwater Aquarium Fish for Marine Aquariums: Pygmy (Cherub) Angelfish
Angelfish love to pick on soft corals and sps. I have angelfish smaller than a quarter and they all most killed my softie.
I had a flame and never had a problem with him. But you also have to remember all fish are different one may work another may not