At the moment, Luffy impressed me the most, Zoro is very close to him and then, surprise, the third one is Killer.
Against Kaido, maybe the swordsmen have a natural advantage, but I judge what I see and for now, wow, these 3 are heavy hitters.
Law is more a supportive fighter and he's damn helpful, in his way he's doing great.
I'm quite deluded by Kidd, an ignorant trash talker with an OP fruit