There are more ways to measure 'the greatest' than simply ability and speed.
Who has influenced the sport the most etc?
sport??? O.O You must be joking....
Let's take a look at this.
Basketball: Invented by James Naismith with a ball and peach basket. Object is to put a ball through a metal ring. Ancient Native Americans had a similar sport involving a stone hoop perched high up on a stone wall.
Football: Getting a ball that's not even round past a line or over a post. Brute force is used often.
Nascar: Pressing your foot down and turning left.
Drag Racing: Slamming your foot down once you see green.
Cubing: Using intuition, memory, dexterity, pattern recognition, and foresight to solve the most popular puzzle of all time.
Which seems more impressive?
BTW,
soccer is the one sport whose players I do respect. It does require a lot of thought on behalf of the players instead of plays being decided by coaches. The field is also huge so the strikers, defenders, and mid-fielders have to work together.