George Foreman fights each Light Heavyweight champion, in one night, one after the other, at their best as Light Heavyweight champions, from Joe Choynski on. How many does he get through? Rules are fantasy neutral rules, each fight is to the finish.
I think he craps out around Greb or somebody. If he was light heavyweight lineage. I don’t if he was.
Choynski and Root were capable, but much smaller than modern Light Heavyweights. I think he can get through them pretty quickly. George Gardner seemed to have Root's number, but was far less accomplished against the big men. I think the tricky Old Fitz, and O'Brien cause significant issues for the fatiguing Foreman. But I see each succumbing. I think Jack Dillon might be the end for Foreman's run, and failing that I don't see him getting passed Levinski.
This only works on Halloween: Foreman gets himself into Michael Myers Mode and goes through all of them, like "Crap through a Goose", as Patton used to say.
Foreman alone would tire too quickly. More promising would be a tag team of Foreman, Ali and Frazier.
You mean like the 5 men in Toronto? He doesn't do too well. Sure with his punching power he clubs the first couple into the canvas, but his gas tank would betray him. He would rapidly run out of energy chasing the little guys around. Imagine the Jimmy Young fight on repeat after the 4th or 5th opponent.
If he hasn't lost by then, Tommy Loughran ends whatever Foreman has left. So at absolute best, Foreman reaches 1923. I don't think he beats Levinsky, though. He could even lose earlier.