Well theres portrayal and theres feats. Portrayal wise its pretty safe to assume that Sanj and Zoro will always be the top dogs, by whent it comes to feats its hard to say that Zoro is over Yamato(though I personally belive thats the case) and almost impossible to say that Sanji is even equal to her
Considering that she joins, it's her "joining" arc.
Characters always get some special hype, either by feats or character wise on the arc they join.
What I expect with all my heart, is that Yamato keeps being strong AF after she joins, and doesn't end up fighting "tobi roppos" when she was obviously supposed to fight "calamities", like Jinbei. I find it quite symbolic that Jinbei didn't fight Jack, almost as if Oda is saying that "this last spot is reserved" for Yamato later on.
Meaning that we will 95% for sure get Fantastic4(?) vs 4 Admirals. The only doubt is if Greenbull fights either Sanji or Yamato. Both make sense for the little that we know about him, lmao.