How would a prime Ezzard Charles, say that beat Louis, do vs Sonny Liston (circa 1964- 65) Brian London Floyd Patterson George Chuvalo Zora Folley Cleveland Williams Ernie Terrell Karl Mildenberger And whoever else, if any, that I may have overlooked. And these are all as they were at that time period, whether prime or not. But you can give your analysis on how the prime versions of these fighters do vs Charles.
Ernie "The Octopus" Terrell might have a shot at an "upset" win. Terrell at 6'6", 210 lbs, 82 inch reach vs Ezzard at 6'0", 73 inch reach, 185 lbs.
Actually, I feel that Terrell might be a tough fight for Charles. Terrell had a huge height advantage and would likely jab and clinch. Liston would be tough as well.
Liston would be tough. A 1950 Ezzard Charles, IMO would likely have outboxed the 1964 Liston. A 1958 Sonny Liston would be a dangerous assignment.