If Greb had a beard, he'd have beaten Flowers. Brian Mitchell had maybe the greatest mustache of the modern era (Lupe Pintor had a top one too). I like Gianfranco Rosi's beard for the #1 slots if your interested only in beards though. It wasn't always full but it took no ****. Hollyfield had a great beard when he fought Moorer. Out of the current crop, I think perhaps Kessler has the potentiol to reinvent himself as bearded. Maybe he could bring back the beard. Maybe.