Jake laMotta Fritzie Zivic ( legendary welterweight and acknowledged dirtiest fighter of all time ) said of jake " if that son of a ***** had the punch to match his chin he'd be champion forever" Hagler two of the biggest right hand punchers from 135 to 147 in Duran and Hearns both bust thier hands landing on Marvins iron jaw .
True - not saying the best ever......but the Pacquiao fight showed he got walloped left, right and centre and was still standing. Others I have seen: Margarito Hatton - pre Collazo/Castillo Froch Naz Slightly biased towards the British, but I'm not a hardcore boxing fan.
Hagler I think. Honourable mention to Peter Manfredo Jr for taking those crushing blows from Calzaghe and not going down.
Have to respect Lovemore Ndou for being in with some good fighters and being tough as nails. Guy is nearing 40 and was still competetive against kell Brook recently