I've been watching a lot of boxing anime lately, and decided to start watching old footage. I have a relative named after Jack Dempsey, and I gotta say that the Dempsey roll is a hilariously aggressive technique. Literally forcing yourself to repeatedly almost stumble by punching hard af is pure dudes rock energy.
Eric Morales. His fights with pacman are great.
If you want to watch a real life Rocky movie check out the Arturo Gatti micky ward trilogy. Not the best boxers but the two beat the dog shit out of each other then spent the night together in the hospital