In light of the Daft Punk news, I highly recommend checking out Interstella 5555 if you're feeling nostalgic.
It's a 2003 anime of their entire Discovery album, with an original story but no dialogue. It's dope.
First of all, the title "greatest athlete of all time" is ridiculous, highly subjective, and is impossible to measure.
Secondly, Serena Williams is the greatest athlete of all time.