I watched the Sugar Ray Leonard v Hagler fight again on youtube the other day - an absolute classic. For some reason Hagler (a southpaw) lost the first two rounds because he tried to fight orthodox. Leonard eventually won a close fight on points so that decision was probably crucial.
I hope you are including videos, because otherwise I've no bloody idea. Mine would be: Tyson Sugar Ray Can't pick a third. Probably Ali but there's too many I like. Honorable mention: Rocky Balboa
Too many to mention or separate in abililty down the years but if you like the heavy hitters there weren't many more brutal than Marciano, Foreman and Tyson in their prime.
Arturo Gatti vs Micky ward 1 what a ****ing fight. The 9th round was legendary !!!!!!! Brutal I think it was Ring magazine's fight of the year....
i've checked your system event log and can confirm that those are indeed the best three you ever saw. in 4th place you had jockie marciano, the scottish-italian boxing midget dart-player, whose half-brother was once accidentally feted by dexy's midnight rubbers, an infamous musical combo who used to go around washing off graffiti and the odd banksy. marciano's family were caught up in the famous scottish ice-cream wars.