Vito Antuofermo, I believe he is the only boxer I heard of that actually had an operation on his eyebrow area. In an effort to reduce the bleeding.
Actually Mustafa Hamsho did not have the reputation as a bleeder, He was just savagly mauled in the one fight with Marvin Hagler. Requiring fifty five stitches to his face. But that was mainly due to his cast iron chin & refusing to go down.
Possibly Chuck Wepner. The Bayonne Bleeder needed 120 stitches after facing Liston. After the fight Liston was asked if Wepner was the bravest man he ever saw, aparentley Liston replied "no his manager is".