All 4 in the ring at the same time, last man standing wins. No neutral corner rule but they won't be able to stand over downed opponents. Who wins?
Papkes the most violent, Ggg is the most skilled, Fullmers the most durable and Walkers the toughest….dealers choice imo …bar fight I’d say Papke, fists only with no breaks I’d say Walker, boxing I’d say GGG and last man standing I’d say Fullmer
Those old school dudes were much more scrappy, so I don't think Golovkin would win against all 3 of them despite arguably being more skilled. I'll pick Walker.
Considering Golovkin never beat anyone even remotely as tough or talented as these guys Id say he gets carried out of the ring first. You dont spend your career ducking everyone with a heart beat unless you know something your fanboys dont.