Marco/prime chinjao
Jack
Doffy/cracker/jozu/vista/Inu/Neko/post mm sabo
Luffy/ pre mm sabo
Ace
Law/Hancock
Zoro
Prime Chinjao hype seems to be there, I'd put him along with Marco, but he might be lower I'm giving him a huge benefit of the doubt he wasn't a rival to Garp but somewhat challenged him. Jack might be on Marcos level and at the very least right below those guys. Then it's the doffy, cracker jozu and vista, post mm sabo along with Inu and Neko. Those guys seem to be in a similar power level, although I feel doffy and cracker are better than Inu and Neko but they probably give each other really high end of high diff fights. Weevil might be on jacks level but I don't kno anything about him so i left him out, he got some good hype. Luffy is next with sabo, ace is slightly below just can't see him being on G4 level. Hancock is underrated she is pretty strong so she can really challenge guys like zoro or law. And zoro hasn't shown everything he has so that's why he's in the bottom and the list is full of very strong characters. I'm personally curious about weevil hopefully the guy is stronger than luffy and it'd be interesting of his role in the story is.