Yaqui Lopez in any of his high profile losses pretty much. I also remember In Jin Chi the iron chinned Korean giving Erik Morales all he could handle in a great fight.
I couldn't find more than two rounds for Benitez. One of the most impressive performances I've ever seen.
I’ll skip fights where the loser may have been on the wrong end of a bad decision: Mike Weaver vs. Larry Holmes I — he outjabbed Larry for good portions of the fight and was just gritty. Tex Cobb vs. Michael Dokes I — I think this was Randall at his best Sean O’Grady vs. Jim Watt. — Bubblegum Kid wasn’t ready for the Glasgow Kiss but fought really well in an unfortunate loss Ray Mancini vs. Alexis Arguello — young Boom Boom showed the heart of a champ and the skill and determination to go with it before the cool-headed veteran finally overcame him