Some of it implies that you've taken your share of beatings and held up and kept coming. Some random names I thought of:
Jean Pascal - been in plenty of wars. Got rattled, glossy eyed often but still durable. Fought with separated shoulder one time only firing left hooks for a quarter of the fight
Orlando Salido - tough luck kind of guy who fought a lot of names and beat some. Maybe a guy where the fight doesn't start until he's hit the deck
Michael Katsidis - blood and guts, he was tougher than his skin could handle, always cut up. Put JMM down pretty hard their fight
Tomasz Adamek - iron chinned even up to HW, until the very end
Inoue had some things busted on him in the Donaire fight and kept going. He is tough as hell.
Inoue gives me hope for the future of the lighter weights. Hard hitting and tough as nails.
Johann Duhaupas deserves a shout. Aside from a roided out Povetkin stopping him late, this guy is tough as nails. Took so many big shots against Wilder and kept on coming.
Glen Johnson would be my shout, that guy was nails man.
He barely ever got dropped or hurt and fought everyone.
ODLH
JCC Sr
GGG
Floyd
Maidana
Ruslan
Fury
Jack
Bradley
Pryor
Norris
Yaegashi
Margarito
Pacquiao
Wilder
Kovalev
Beterbiev
JMM
Morales
Golovkin and Canelo.. Those two guys both took some wicked punches in their two fights not to mention shots they took from Jacobs who can punch. . I remember one shot Canelo took from Danny that I though would buckle him but no.. Golovkin Koed Geale while receiving a hard shot to the head.
GGG and Canelo are two of the toughest boxers around today. Nobody can knock them down and they have traded blows with some great punchers including each other.
GGG. I'm not saying he's best or worst...but we found out in the Canelo double that he can take just as much as he gives. I think Inoue is going to be like that.
Whyte and Chisora don't ever give an inch.
GGG has an unbelievable chin, he’s definitely in the conversation.
Whyte and Del are both tough guys, no doubt, but I wouldn’t say they are in the same conversation, both have been completely iced for example.
GGG. I'm not saying he's best or worst...but we found out in the Canelo double that he can take just as much as he gives. I think Inoue is going to be like that.
Whyte and Chisora don't ever give an inch.Inoue had some things busted on him in the Donaire fight and kept going. He is tough as hell.