I don’t think that the ethnicity of the actors really matters all that much, the height & hair color are the only real trait that describes how Rand stands out. Honestly the only character with a skin color description I can recall is Tuon? And that isn’t really something that matters either…

Bigger issues as other people pointed out are things like inventing weird bullshit storylines when you have 10k pages of content to draw from, or messing with the “hard rules” of the magic system, such as you can’t burn out in a circle, or heal someone from death.