<edit> Also, you seem to be making a point, then qualifying it so much that the point is totally useless. "There are no black guys in movies except the following huge list of exceptions, ..."
You misunderstood completely. I'm saying there is a
very finite number of exceptions in which current Hollywood films star black people. Your average movie is not going to have a black lead. Let's look through the current movies in theaters:
http://www.imdb.com/showtimes/The movies I see starring blacks (though this last will probably vary based on theaters near you):
Marley - a documentary on Bob Marley. Falls exactly into the category of "needs a black man for even a shred of legitimacy"
No One is Safe - an action flick starring Denzel Washington
Tyler Perry's Good Deeds - a story about a businessman and one of his office staff
Think Like A Man - a pg13 rom com
I count 4/48. Of those, I say 3 of the 4 could be written for either a black or white lead, with the obvious exception being Bob Marley's documentary (because who the hell would go see a documentary about Bob Marley starring some white dude?). Of the remaining 3, I contend the last two matter more because those roles tend to require better acting ability. So the number of films in which a black person is cast to be a leading actor is quite small. Even if you remove all the remakes/re-broadcasts, animated films, historical films, and movies based off books, the number of movies in which white people are cast as leading actors is much greater.