Pretty impossible to say, a load of his fights don't have weights listed, and weights from that era are often pretty sketchy, often just they said they weigh such and such (even when they were blatantly wrong) and it gets listed, or someone estimated it. Going by boxrec he beat Sam McVea by a news decision and in the RTD49, while weighing under 190. I think he was for his first fight with Langford, but I've only seen him being said to be 20Ibs heavier, and the few weights listed then.
I'd put Sergey Kovalev and Bernard Hopkins on that list. Kovalev a big light-heavyweight. Weighed 188 against Hopkins and 189 against Pascal on fight night. Hopkins also weighed 182-185 on fight night as a lhw. Both were skilled fighters. Kovalev was a devastating puncher. I think Langford and Greb are too high. Both were at their best around 160-170 lbs. Both were 5'8. Fitzsimmons is too high. He fought in the 19th century. An all-time great fighter but that's due to his accomplishments. Fitz and Corbett aren't top 20 imo. I'd rank Spinks a lot higher. Ezzard Charles was a better fighter than the ones ranked above him. I'd pick prime Charles to beat Tunney, Marciano, and Dempsey. James Toney is way too low. Toney outboxed Jirov at 190. That version of Toney should at least be top 10. RJJ should be ranked a lot higher as well.
1. Dempsey 2. Marciano 3. Charles 4. Tunney 5. Langford 6. Patterson 7. Schmeling 8. Fitzsimmons 9. M Spinks 10. Corbett
Dempsey Charles Langford Holyfield Tunney Sullivan Schmeling Marciano Greb Spinks Conn Patterson Moore Foster Qawi RJJ Loughran Toney Fitzsimmons Corbett
He juiced to get his weight up for the second Bowe fight, his punches had no effect on Foreman but battered Tyson all over the place, you could see he was far stronger than Mike inside, in the first Bowe fight he got bullied all over the place on the inside.
He got bullied because motivated in shape Bowe is stylistic poison to a smaller guy who liked to brawl but had little power. Holyfield tried to outfight a guy who was 6'5" with one of the best inside games we've ever seen on a heavyweight. Bad game planning against Bowe. The more Holyfield moved the better he did. Bowe was fat for the second fight.
1. Evander "Evan Fields" Holyfield 2. Mike Spinks 3. Carlos De Leon 4. Anaclet Wamba 5. David Haye 6. James Nathaniel Toney 7. Juan Carlos Gomez 8. Robert "Bobby" Foster 9. Dwight Muhammad Qawi 10. Johnny Nelson Stone cold lock.