oh stop. Act like when you see Sam Jackson in a movie, you don't just think "Sam Jackson" regardless of what character he's playing. Same goes for Bruce Willis, and he's white. Bruce Willis was in 5th Element, but putting him in a massive franchise like Star Wars would be distracting as a mother fukker. All i would think is "why is Bruce Willis in this movie? They couldn't find someone else?"
Forest might be unfair, i guess he has some range... but i still always just see Forest Whitaker. There are tons of actors like this. Adrien Brody is another non-black for you guys.
... oh and Will Smith is gonna be distracting as a mother fukker in a superhero movie even if he's in a mask for 50% of it. He shouldn't be in a superhero movie.