Warren Moon the best one. Randall Cunningham was decent, Steve McNair was decent too. I think DeShawn Watson has the potential to be very good if he can stay healthy. Lamar Jackson still unproven. He looks good so far but have to give him a full season. Once defenses spot his weakness and adjust then we will see how good he is. Mahomes is mixed, I don't really consider him a black QB. The thing with any mobile QB regardless of color is the abilty to stay healthy. These guys get out of the pocket and take a few hits and get banged up easily. McNabb was average as was Doug Williams. Cam is good but injuries are starting to take a toll on him