::EDIT::
Also, Conan had lots of non-white buds. In fact he primarily ran with them exclusively until he became king of the white people in Aquilonia.
The only white guy friend I remember at all was that blonde Fabio looking Scottish guy who became a zombie.
Yeah, but in every single case he was the automatic and natural leader. ... and Howard still went out of his way to make them look like primitives, just nice ones.
Conan was the automatic leader of everything he touched. He was Conan. That was like, his superpower. Stygians weren't primitives, they were just ultra-evil. They weren't even all black. Thoth-Amon was totes a white guy in most visual depictions. Kalanthes of Ibis was also quite the refined personage, and he was black.
The only ones I can think of that fit that bill perfectly were the Picts, who were in fact all illiterate black jungle savages.
Also someone mentioned that the more advanced and civilized you got the whiter you got in Conan. You're missing the point of those stories. All of those people who were refined and advanced were usually the actual "barbarians" of the story. There's always some group or person who seems primitive or savage, and then the advanced white people (usually some kind of wizard or mad scientist) prove themselves to be the real evil by the end. Specifically the Hyperboreans were immortal, ultrawhite Michael-Jackson looking folks, and while it seemed like paradise at first it turns out they are an amoral self-righteous pack of bastards by the end.
I ain't saying that the author wasn't racist. I don't know jack about him as a person. But Conan was super not-racist as a character, and always managed to overcome racial differences to succeed.
I did not mean to write this wall of text.
Also I hope this doesn't turn nasty, this is an interesting discussion to me.