The three guys in that list I would have a problem with is the Hackenschmidt guy, Gorgeous George and George "The Animal" Steele.
My list in their proper order:
1.) Hulk Hogan -transformed wrestling and brought it mainstream
2.) Ric Flair - greatest wrestler, Hulk was a performer
3.) Andre the Giant - unbeatable, if this was real, and much loved
4.) Bruno Sammartino - how many straight years did he carry the WWWF on his back?
5.) Lou Thesz - one of the two best technical wrestlers ever
6.) Buddy Rogers - this guy WAS southern wrestling and an inspiration for tons to follow
7.) Dusty Rhodes - the best down to earth everyday Joe type of wrestler ever
8.) Bret Hart - the other best technical wrestler ever
9.) "Stone Cold" Steve Austin - helped to turn wrestling away from black/white, good/bad introducing grey into wrestling
10.) Hawk and Animal - greatest tag team ever bringing tag team wrestling to it's pinnacle