Zoro is main man here, whatever others did, it doesnt matter, Zoro was always first, cause everything that Zoro did, he always did it in a badass way,... everything else doesnt matter,... just like how Zoro pretended by saying that all of their attack doesnt work on Kaido, he waited until hes half dead to use Asura to mocked other SN... Zoro is the only one who managed to cut Kaidos scale after Oden (forgot Scabbard), while Luffy tried to punched it many time, Law used Gamma, Killer used Sound, and Kid used his Punk, all Kaido did was pretended to get hurt by screaming... because scar is all matter, if only Luffy can scar someone by punching it, but no, Luffy need to use sword just like Roger and Shanks, if not, once Zoro realized that PK is also WSS