Since you wouldn't understand a serious lecture on writing, fortunately for you a kids show perfectly explained the kind of archetypal duo Zoro and Sanji represent as opposite characters:
It's delusional to even argue that Sanji and Jinbe are the opposites here when Oda built the Zoro-Sanji duo so well that he got simpletons like you turning their opposition into an identity trait.
Oh, and guess what: Zoro and Sanji opposition as characters has actually been relevant to the story, unlike your fantasy.