The Undeafted did a poll of 10,000 people to compile the 50 greatest black athletes of all time. I wont copy/paste the whole section explaining the rankings, just this part:
" Each athlete was ranked on four factors: overall ranking, dominance, inspiration and impact on society."
If you put the mouse over any of the numbers 1-50 on the bar going across the top of the screen a dropdown will show you the full list.
Needless to say, I have thoughts.