You talking about a Lemon Peel Dwarf Angel or just the regular Yellow Dwarf? Either way they are more prone to aggression and coral nipping than some other varieties. The issues with dwarf angels are two-fold: Coral Nipping and Aggression towards other fish. All Dwarf Angels can nip and be aggressive, but there is evidence to suggest that some of them are more prone than others. A Coral Beauty is probably the best overall bet for a Dwarf Angel if you are willing to chance one. That isn't to say they won't eat your coral or be aggressive to other fish, it just means more people have had success with them than other Dwarf Angels. The good news is that they are widely available, hearty and are one of the cheapest dwarf angels. If you do get one, get a really small/young one as it will be more likely to learn to get along with tank mates and not have developed a real taste for coral in the wild. Your success also has a lot to do with keeping it well fed and having algae available in the tank.
The only real reef safe angels (and arguably the most peaceful) are the Genicanthus full size angels (ie Lamarck's, Bellus, Swallowtail/Spotbreast) but they generally require a 125 gallon minimum tank. I would love to have one but I think they need the 6 foot length.