angels are iffy, but some that come to mind that do well in reefs :
coral beauty (as mentioned above), flame (not a bad rep for reefs), multicolor, interruptus, resplendens, joculator, fishers, flavicauda,
ummm few others i can't think of
Genicanthus angels are the most reef safe you can get. They usually dont pick at anything if they are fed well.
you have options, but always have a back up plan.