I'd favour nobody over Gomez at 122 but Fenech and Jofre have the best chance IMO. At 140 i'd give give Chavez, Pac, Whitaker, Floyd among others a good chance against Pryor at 140.
Lopez at 105 is the easiest call for GOAT of one particular weight division. The gap there is bigger than the gap between Gomez and the rest of the field. Certainly bigger than the gap between Pryor and the rest, even though I personally think he was a legitimately great fighter for a sport timespan.