I'm not going to be popular for this but I consider Deontay Wilder one of the bravest. He never quit, even when incredibly exhausted and for all intents and purposes looked done. He's got more heart and courage than a few of the most heralded heavyweight champions on this board.
There are a lot of brave fighters. Especially those champions during the rematch clause era who went right back into the ring with a guy who sparked them only for the exact same thing to happen again. Floyd Patterson against Liston and Bobo Olson against Robinson spring to mind. Imagine that? Forced into another Crushing knockout defeat back to back with no tune up fight to find your mojo again.
Fighters with zero punching power imo You need all the IQ, skills, and intagibles to survive inside the ring.
I think there are many brave fighters and we can’t give it to one individual for being the bravest. But I think Paulino Uzgadan had to be up there
Depends on your definition of brave but I’ll go with Floyd Patterson…being brave is being scared but pushing through anyway. Even after getting brutally knocked out twice against Liston he wanted badly a third match. Whenever the man got knocked down he tries his best to get up (and did plenty of times). Being “brave” is bit different then say fearless. There were plenty of fighters who never knew fear in the ring.