Like in universe they don't, but don't dragonborn come from people wanting to play the draconians from dragonlance but in other settings?
-There's a 'good drow' faction for the drizzit clones
-An Orc lead his fellows into conquoring some territory, following visions, in an effort to create an actual nation of orcs instead of various warbands/raiders/bandits (and give players a source of good orcs for player characters)
Those are the ones I can recall off the top of my head, I don't pretend to be exceptionally familiar with the details and I expect I've missed some things.
I feel the whole fun of drizzit clones and good orc characters.. is to be outcasts? If there's a whole faction it's not as fun.
Like necromancy, you want yours to be a wizard whos breaking the rules and going to desperate lengths no matter the cost, not in a necromancer country where all the schools teach it and everyone accepts it?