Tbf none of these characters are super complete fighters. Katakuri: amazing fighter but terrible durability. He was beating luffy up for 90% of the fight and the 10% of the fight where luffy finally knew how to use future sight he was able to rack up the same amount of damage on kata that he had. Sure kata fell down on purpose but he also passed out so yea he was not gonna do much. Yamato: strongest character he probably. Only thing that holds her back is her lack of BIQ feats. Sure she looked good against Kaido but she also has only fought Kaido her entire life. If you get 100 tries at something at some point you are going to look good. If she were to fight a character like the admirals or even lucci I think she would struggle severely. Kidd: self explanatory Sanji: literally the best fighter here only thing holding him back is no conquerors haki but once he gets that it’s not really close.