LOL what about Rock, HHH, Vince, Bret hart, Shawn Michaels?
This isn't the most over, or the best, wrestlers, it's who has the most impact.
Apart from McMahon, The Rock, HHH, Bret & Shawn didn't change wrestling.
It's been banded about how Thesz & George changed things and not many of us can comment due to not being there, but Hogan and Austin each ushered in major changes in wrestling. Actually, they rather were at the forefront and carried the change.
The Rock, HBK, Bret Hart all have their places in wrestling, but they didn't change much. The Rock is interchangable as perhaps one of the top 3 superstars of all-time in terms of interaction with fans and television markets, however he was right guy, right place, right time. He took the baton from Stone Cold and kept running with it and became a MAJOR star, but he didn't change anything. They were each a part of what came to be, but none where put under pressure of having it all change beneath them due to them being so strong on top.
As said, I can't comment on George of Thesz, but I know without Hogan wrestling wouldn't have been what it was in the 80s; and without Steve Austin in the mid-late 90s, wrestling would not have been what it was. Therefore, if those weren't around, Bret/HBK wouldn't have been ingested as much of Hogan, and The Rock without Stone Cold.
In Hollywood, there are 100 fantastic actors but only a few who can sit on the top and change the entire outlook of the business, which one a handful of wrestlers have done.
Also, HHH is a nobody when it comes to a top 5 in wrestling, and would be a push for top 10. (And that's coming from a genuine fan of him.)