mine are black panther, luke cage and storm
Manhunter from Mars
Black Panther (even though I'm not sure we should consider him minority since everyone in Wakanda is pretty much black, and that's where he lives)
Deadpool (he's one of a kind and can't exactly go around unnoticed, mask or no mask).
I don't know if I can narrow it down to three. I'll just name three randomly.
Jaime Reyes is AWESOME in my opinion, and the Blue Beetle book is great. I hope his book does not get cancelled soon.
Vixen is awesome too, and should be more utilized in the DCU, instead of being shoved on the DL. I hope to see her in Animal Man soon.
Traci 13 is also great, and she should come back, along with Natasha Irons.