Muhammad Ali (603) Joe Louis (586) Jack Dempsey (467) Larry Holmes (452) George Foreman (447) Jack Johnson (432) Rocky Marciano (412) Sonny Liston (382) Lennox Lewis (361) Joe Frazier (349) Mike Tyson (276) Evander Holyfield (271) James J Jeffries (264) Gene Tunney (226) Sam Langford (171) Ezzard Charles (120) Jersey Joe Walcott (88) Wladimir Klitschko (86) Vitaly Klitschko (83) Riddick Bowe Agreed or not?
Too high: Dempsey, Liston (less so) Too low: Lewis, probably Tyson, Wladimir. The rest seems ok at a glance, obviously a few names here and there I might have one, maybe two spots higher but they seem to be in the right ballpark roughly speaking. The names above are the only ones I feel are conspicuously too high / low.