Gene Tunney at 30 is a joke. Top 10 at the very least, ahead of Harry Greb to. Don't get how he beats Greb 3 of 5 times finishing once with a draw, wins the biggest fight in boxing history versus Dempsey yet I've never seen a list where he is higher then Dempsey or Greb. And had the 10-9 scoring system been in effect for the first bout with Greb he would have won that one to. Tunney for whatever reason wasn't liked throughout his career and that has greatly affected his legacy as a great fighter. He got a bit of a late start on his career and didn't face any real competition until he was 30 fights into his career, but come on...