wait wait wait... I was with you until you said "no other athlete has dominated" and then preceeded to disparage Usain Bolt.
Now granted you may have been living under a rock... But while Tiger is a pretty damn good golfer, Jack so far as achieved just as much if not more than Tiger. There's never been ANOTHER MEMBER OF OUR SPECIES as fast as Usain Bolt.
At the 2009 World track and field championships in Berlin, Tyson Gay of the US ran a 9.71, the 3rd fastest time in the history of man.. and got obliterated by almost 10meters by Bolt who ran a 9.58(in to a headwind mind you). That 9.71 by Gay would have won every single other track championship during the history of man except for the last olympics. And to top it off Bolt Smashed Michael Johnson's 200m record of 19.32 with his 19.19... a record most in track circles saw as the most unbreakable of any track record ( the 19.32 Johnson ran was the WR by almost 0.3, an eternity in sprints)
As I usually preech on this board, have some perspective. Tiger is unquestionably dominating and a talent unlike most will ever see. But he's not the most dominant athlete of his species like Bolt, an athlete that trandscends the boundries of what is thought possible. That said I'd still vote Tiger for top athlete