Thierry Sokoudjou- Blows what cardio he does have in the first 2-3 minutes in the 1st round as well kind of needs some work on the BJJ
Vitor Belfort- Use to be gun shy when facing a wrestler ,never through any punchs because he didn't like the ground as well his mental game wasn't there, to bad tho because he has very good reservals on the game and stand up.
Thiago Alves- He showed the same hesitation to throw strikes at GSP, because of how easy GSP took him down. Kind of sad because his strike game is very good and he seems to be about to get back up very quickly so I don't see why.
Paul Daley- little to not ground game and needs to get to his feet if he's not going to do something down there. Some BJJ would be nice.
Chieck Kongo- His wrestling has gotten a bit better, but he's lost once he gets to the ground. He's giving up 30-40.lbs up against some of the bigger guys. So he needs to get a ground and fast because those contender fights will hit the ground so you better have some knowledge of BJJ.
Maybe you can add a few more names here, but at the moment thats all I can think of so add them if you think of anyone else.