Katakuri-Marco-King
In my opinion these guys are around the same lvl, even thought im be honest, I kinda expect more of Marco.
I view that with objective view, Katakuri had everything, adv CoO, awakening, great CoA, CoC and a very strong lethal weapon(Mogura).
His feats where impressive, he stomp Ichiji, he easily pass Capone,Jinbe and Pedro at the samtime.
King in compare as also has insane speed and strenght power, his flames going play a huge role too.
I hope for more haki play and also zoan awakening, in that case and what for feats he going to show.
Marco has a very good devilfruit and is very fast and strong.
But I dislike that we didn´t see any haki feats, in compare to Katakuri arsenal he kinda seems be to "normal"...
I feel like via feats either King or Kata gain the most best role.
Not saying Marco feats where bad, he is just the victim of this raid to give Zoro and Sanji strong commanders as opponents.