Usyk vs Chisora = 217 vs 255 vs Joshua = 221 vs 244 vs Fury 1 = 223 vs 261 vs Fury 2 = 226 vs 281 Louis vs Simon 1 = 202 vs 254 vs Simon 2 = 207 vs 255 B.Baer 1 = 201 vs 237 B.Baer 2 = 207 vs 250 Carnera = 196 vs 261 Holyfield Bowe 2 = 217 vs 242 Foreman = 208 vs 246 Holmes = 210 vs 233 Douglas = 208 vs 246 Chris Byrd vs Vitali = 210 vs 244 vs McCline = 216 vs 270 David Haye vs Chisora = 210 vs 247 vs Valuev = 216 vs 316 Archie Moore vs Baker = 190 vs 209 vs Valdes 1 = 180 vs 209 Deontay Wilder vs Helenius = 214 vs 253 vs Ortiz 1 = 214 vs 241 vs Breazeale = 223 vs 255 Sam Langford I haven't got the actual weights but Langford was Middleweight sized 5'6 guy who beat alot of notable Heavyweights. Other notable wins with weight disadvantages..... Quarry vs Lyle = 200 vs 219 Chagaev vs Valuev = 228 vs 319 Holmes vs Jones = 211 vs 254 RJJ vs Ruiz = 193 vs 226 Hunter vs Bakole = 213 vs 256 Anymore you can think of let me know.
Jack Dempsey at 187 vs Willard at 245 Bob Fitzsimmons at 158 vs Gus Ruhlin at 195 Sam Langford at 168 vs Sam McVea at 205 Sam Langford at 158 vs Iron Hogue at 196 Max Baer at 209 vs Primo Carnera at 263
For me it has to be Dempsey vs Willard. And Willard took an absolute savage beating. Has any title fight with that type of size disparity been as one sided and brutal? Baer vs Carnera was another one but Baer was almost 6'3 he was just at a weight disadvantage and the beating was more prolonged.