Some will say Gerry Cooney was his own worst enemy. But Larry Holmes beat Cooney worse than Cooney ever beat himself, even directly after puberty struck. And with a more two-fisted attack. Allegedly.
I'd give him a fair shot vs the likes of Wilder, Joshua, he doesn't beat the likes of Usyk, Fury, etc. The next tier below those guys like Joyce, Dubois, Parker, Ruiz, Whyte, Zhang, I could definitely see him winning his fair share of fights amongst this lot but theres a few who could beat him aswell. Overall I think he'd be between lower/mid top 10 of this era.