Mister Spaceman said:
Fantasy RPG's, even Scifi RPG's, have become a little too "white" for my tastes, to boot. Let's get crazy, let's add a few ethnic spices into this old recipe!
Of the ones listed, I'd have to go with Native American. Although you'd probably have to go a bit more specific, since different tribes had different legends. Just sayin.
Anyway, you've reminded me of a Fantasy setting in a novel by one of my favorite authors (Lois McMaster Bujold).
It's set in mid-western America, along the Ohio and Mississippi river. However, it's set after a magical apocalypse that's reset society to a swords and horses level of technology. The interstate highway system still exists, albeit in ruins, and cities like Detroit and Cleveland are underwater - and spoken of as the oldest of myths and legends about the "Great Wizards" who once lived there.
So overall it has a sort of colonial/old west/Mississippi Riverboat feel, but without guns and with swords and magic (which may actually be psionics, but since no one remembers the difference, it doesn't matter). Oh, and with no nations - city-states are the main socioeconomic/sociopolitical unit.
Oh, speaking of my favorite authors, Jacqueline Carey did a pretty good Aztec fantasy novel in Naamah's Blessing (her 9th Kushiel novel, spoilers abound, so be warned). She didn't do bad with Indian mythology in Naamah's Curse (the 8th novel) either.