Marco could take out all the Kage. He's pretty much intangible for one and if he does get hit he's shown himself to be able to recover from fatal damage. He'll easily be faster than any of the Kage too with the exception of possibly Raikage and can easily fight on par with an Admiral. Jozu too is equally powerful and blocked a hit from Mihawk, the same hit which easily cut through Aokiji's iceberg. Whitebeard cause Tsunami's and rip Island's in half, such is his power, so that already far outclasses any feat shown by the Kage.
This is a pretty big stomp. The only possible threat I see here is the Tsuchikage with his powerful jutsu, but he's old and not fast enough.