Sanji is the most obvious one since he is the only one Kind to her. Yes he is simping around with any other women that he met, But She is the only one Compatible with Sanji so far. Sanji Never even Mad at Pudding despite what Pudding says to him, He just sad, crying and taking it like a Man. Cuz he thinks that he is worthless which he is not. Thats also one of the reason how Pudding were falling in love with Sanji since despite what she says, cuz in reality he is the most Kind People in the World.
He only mad at a woman that even hurt his precious friend like what Kalifa did, but he never hurt her. Plus i can see that she can end up Married with him, Back to Baratie with her, Open up the Restaurant with some New Bakery Menu on it, and set sailing around the world to gather matherials with baratie crew because he already found the All Blue EOS.
People might forget but Pudding already Kissing Sanji, You know its sacred in Anime world lol, yeah i know he had that memories taken from her, but she can just gave it back when Sanji saves her.