have 3 with no issues!

I had 3 together in a 33 gallon for 3 years, then transferred them to my larger setup where they lived together for another 2 years. They would squabble, but there was never any pieces of tail missing ever.
If you're looking for other beautiful colors in a fish, there are a tonne of wrasses that are reef safe, unlike dwarf angels. Just make sure you have a top though in case they jump.

I have a flame and Coral beauty in my 150g and they get along great.