Black Maria definitely. It is acknowledged entirely in the chapter and Robin is physically exhausted. Ulti and Page 1 too if we are riding on the dialogue of Bao Huang.
However, you have to still acknowledge that Sasaki and WsW's fights are inconclusive atm. No acknowledged or announced defeats. The chapters end on their attacks or are entirely transitioned from once they do land them, unlike Robin's which has her attack, but then continues to play out the scene to where Black Maria's subordinates acknowledge her defeat and Brook goes to help her.
Jinbe and Franky are also still perfectly healthy in terms of being able to fight. So either you are in fact right, and these 2 are used somewhere else, or Sasaki and WsW aren't down just yet.
Hopefully now that we've seen each fight at least once, 1022 will at least answer what happens next. CP-0 could very well explain all 5 are defeated. Or they could also make comments about some of the Tobi Roppo being stronger than others, then que scene of us going back to Franky and Jinbe, idk.