People know Babe Ruth around the world.If Brown was that great he would have transcended his sport worldwide, he didnt.
Most famous athlete ever (Ali, Ruth, Jordan)? Greatest sports personality ever(Ali)? BEST athlete ever? hmmmmmm...

"Transcending his sport" is relative to marketing and the times the athlete lived in, relative to other factors. Sorry, but you need to change the title of your thread, as the initial one fails miserably.