Yeah, that Gretzky comment was one of the most uninformed things I have ever read on here. Wow. He's rated too low as well, he really is one of the most exceptional athletes of all time in any sport.
Another chap left off the list (though I can see why, with it having an American bias) is cricket's
Don Bradman. I don't even like cricket and his record is mind-blowing. By far the best cricketer of all time. If the list is about "athletes who surpassed anyone else in their sport" he would be in the top 5 easily. He was literally 50% better than
any other hall of fame cricketer.
"Bradman's career Test batting average of 99.94 is often cited as the greatest achievement by any sportsman in any major sport."
The rest of the top 10 ranges from 57.40 to 60.97. His is
99.94.