For sports figure I would put Woods over Pele at least for the reason Woods is around now when there is many times more media than in Pele's day. Ronaldinho would be more recognizable than Pele mainly because he has a unique look. Beckham would probably be more recognizable that either of them.
Assuming you agree bodybuilding is a sport, I'd vote Arnold as the most recognized sports figure. He's transitioned into two other "public eye" classifications so it's a little sneaky to put him on the list but he'd still fit.
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