Hi guy just to share some of my few mth experience on SPS and angel from different family.
Up to date, I have a few kind of angel all from different family.
Flame Angelfish - Centropyge loricula
Bellus Angel - Genicanthus bellus
King Angel - Holacanthus passer
Cortez Angel - Pomacanthus zonipectus
Blue Faced Angel - Pomacanthus (Euxiphipops) xanthometopon
Regal Angel - Pygoplites Diacanthus
Hmmm in general, they are quite reef safe in my almost full SPS tank except for the King Angel - Holacanthus passer, it will actually nip on the flesh of my monti causing it to be botak. Although I feed my tank quite heavily everyday, Dr G food twice a day, 4 cube of mysis everyday and random feeding of pellet. I think maybe is the itch mouth of the King angel, but haha it is still a beauty and I dun mind lossing some monti. So for people with full SPS tank and dun want to loss any gem then try to avoid the Holacanthus family.