Re: Basketball fans: LeBron James the World's Greatest Athlete?
I don't think you should be that broad. He could be the best basketball player, although Kobe fans may not agree, but to say the world's greatest seems like a reach.
It would probably be best to rank by sport, but overall athleticism I would think would go to triathletes, Ironman to be specific. 4.5 mile swim, 110 mile bike and 26 mile marathon back-to-back-to-back all in one day... come on!