WoW this is a tough one I have a few that all rank the same but for a few different reasons...Just to name a couple in no particular order...

Hagler/Hearns...I am a HUGE Hearns fan and Hagler fan as well...Tommy was stepping up to try and claim another world title in a new weight class and Hagler was tough as nails seemingly unbeatable at the time (and this was a time where even the second tier fighters were top notch EG Mugabi,)...It was a bout we all knoew before it started it could end with 1 shot either way...It lived up to it's hype and more...the 3 most exciting rounds of all time IMO

Arguello/Pryor 1....Alexis was so good and soo loved...Pryor so mean and loved to fight!!...Was he going to be proven nothing more then a brawler and have some respect beaten into him by Arguello or was he going to break the thin man and establish himself as the most feared man in boxing under 160lbs...again it lived up to it's hype..action, heartbreak..skill, agressiveness...you name it this fight had it

Leonard/Hearns 1...No need to explain this one

I can name a bunch but I would be here all day