Moore would've beaten Walcott IMO. I think that's possibly his cap, although I may be missing someone. Galíndez would beat Saad Muhammad (top 15 LHW). Mosley's probably reached his potential when he beat De La Hoya. Obha could beat anyone.
I honestly think Moore could have beaten Joe Louis (yes I'm serious). Galindez faced nearly every notable light heavy from '74 to '80, and imo the only ones left would have been Bob Foster, John Conteh, Miguel Angel Cuello, Mate Parlov, James Scott, Michael Spinks, and Dwight Muhammad Qawi. I have a win over Foster or Spinks as his best win, although I find a win over Spinks a shade unlikely.
Moore would have beaten a lot of guys imo. Holyfield maybe the biggest and most tailor made for him. Wouldn’t doubt it if he beat a lot of big 70s guys either. Love Mosley but he had such a strange career arc. At his best I think he could have competed w literally anyone Don’t know enough of Ohba