That's a point that RxM brought up earlier- the "Connecticut Yankee" story as distinguished from the "WTPNiaH" story. The latter seems inextricably linked to WASP superiority, and the former is anyone from a "superior" culture. One example might be "Wraiths of TIme" by Andre Norton, where the protagonist is a black Egyptologist from the modern day, transported into an alternate world where Meroe is a world power.

The question is where the dividing lines are: where it becomes less about personal education and ingenuity, and more about cultural or ethnic superiority.