Oh ya.. always forget that one because it isn't as common, but yes, lemonpeel angels are definately one I wouldn't consider reef safe.. really, with that one I have seen 1 out of a dozen or so that turned out reef safe, so less than 10% on lemonpeels. Same goes for the golden angel, it is more of a deep water dwarf angel and doesn't usually hang around corals, so when you put them in with corals they don't really know what they are and have to nip at them to find out.
Ya, I always used to hear that Coral Beauty/Flames are just about identical in personality.. then I started working at a LFS and got to see first hand, and deal with many returns, of coral beauty angels that turned out to not be reef safe. The 6 line wrasse was definately the most returned fish I have seen due to aggressiveness (A damsel would be #1 if people returned them, but from what I hear from customers, about 90-95% flush the damsel instead of return it which isn't something I like to hear since this hobby and wellbeing of fish and corals is my passion in life, but I don't preach to customers about it), but the coral beauty was definately 2nd on the most returned fish because of the coral nipping.