I have had good luck with Swallowtail angel, bicolor angel, flame angel, and coral beauty angel.
Although I think the Bicolor does pick at things occasionally.
Swallowtail and Flame passed away long ago.
None of which are really "big" though.
The swallowtail, bicolor, and coral beauty were all together.
I do have a 240 G tank though...
Coral Beauty is my oldest fish. I think going on 12 years now.
I have a lammarcks and a flame currently, had a regal a few years ago that never nipped anything.