I'll take Usyk because of his size and skills. Walcott was so tricky though. Size would be the main factor imo
Cmon Seamus the man was fighting to EAT he didn't even take the sport seriously, once he did everyone went dead quiet.
Yes, I am aware that the Great Depression hit Jersey Joe Walcott uniquely among all men. Funny how his weigh ins don't seem to reflect any level of starvation. But I know better, that he was living on a bean a day.