Marco is stalemating King and he will possibly prevail
Sanji seems like having an upper hand on Queen but to our knowledge Queen is probably not that greatly injured so far either so I don't bet a cent on a mid difficulty outcome odds wise for now considering he just went Hybrid and Sanji doesn't seem like he is likely just getting started.
Then again I can see King high diffing Queen, that could eventually place Marco and Sanji close power level wise by the end of the arc. But he would still stand on low YC1 level if that truly proved the case. That's so massively far from yonko level it's still not even funny.