I have to agree with this. You could argue SRR & Ali had comparable signature wins, but Greb achieved his whilst blind in one eye.
Soldier Bartfield beat: Harry Greb Jack Britton Ted Kid Lewis Mike Gibbons One of the better quartets (imo) of a non-champion/HOFer!
Leonard lost to Duran, fought to a draw in Hearns rematch where Tommy was robbed, and many consider the Hagler decision a robbery too.