Current SHC vs...

[SSJ2]

Who is the strongest person the StrawHatCrew can now beat in an Oars style fight?

 

[Captain Cadaver]

With Luffy now being able to prove enough of an annoyance to two Yonko to the extent Kaido's using his hybrid form, I'd say anyone of Admiral tier at least is fair game for them, if not a Yonko themselves depending on how the fight with Kaido and Big Mom progresses.