Sanji Vinsmoke is the chef of the Straw Hat Pirates, and he has become one of the strongest melee fighters in One Piece. He believes that chefs need to protect their hands—so he has learned to fight with just his legs. As a result, he can land very powerful kicks, and his kicks have gotten even stronger now that he can use Haki and his genetic enhancements. Sanji has become quite strong despite not having a Devil Fruit power of his own, but there are Devil Fruits that would make him stronger.
Source：https://www.cbr.com/best-devil-fruits-for-sanji-one-piece/
