July 14, 2013 1:40 AM EDT
None of them because not a single one of them has a single khajiit in it. (Probably for the best, the way Bethesda seems to treat them, they would probly be made the lowest of the low like they always seem to do in Skyrim.)
That point aside I guess it would be Riften, since at least they have a few Argonians in there that aren't practicly slaves (*cough* Windhelm *cough*)