It seems quite clear to me that he absolutely had some sort of ethnic flavoring. Every witness who gave a description of his complexion, which was the majority of the witnesses, said he had a dark complexion or specifically used the term olive. And you can't excuse it away by claiming low cabin lighting or something because Dennis Lysne said the same thing and he saw him inside the bright terminal. Plus, I consider Flo our best witness as for his appearance and she says "Latin descent". So there's just too much smoke coming from that fire to ignore it.
Whenever I create Cooper's for my videos I always do my best to make sure he has some sort of quasi-ethnic flavor to him.