Well, humans are pretty diverse already, no?
Danor's humans are more pale, sort of western European, mostly brown hair, some red-haired. Drakr's humans tend to be blond, akin to Scandinavians. Crisillyir's humans resemble Mediterannean, Turkish, and north African folks. Risur's original population is darker-skinned, sort of central African, but is a big melting pot.
(There would be people resembling Native Americans, Pacific Islanders, Middle Easterners, South Asians, and East Asians too, but they'd be from areas off the map.)