Uni-the-Unicorn!
Hero
That representation could also be in a setting specific guide. That is one thing I wish WOTC did more as given more mechanical weight to different settings.IMO. In settings where the members of a race were treated more homogenously halving a couple of races that were explicitly for the outcasts was very conceptual.
I think they are turning away from those ideas more and more toward individualism for members of the races. In that worldview, you don’t need a race to play an outcast, as an individual from any race can do so.