Kurt Angle 2x NCAA champ, Olympic and world gold
Brock Lesnar 1x champ and 1x runner up.
Sylvester Terkay 1x champ and 1x runner up to Kurt Angle
Jack Brisco 1x and first native American NCAA champ
Bob Backlund 1x NCAA d2 champ
I am going with Angle due to the fact he had beat many other armature champions such as Mark Kerr, mark Colman and many others. It's also been reported that he was able to handle lesnar pretty easy in the back during 2002 and 2003