Mukuro all the way; with ease. There's nothing stopping Mukuro from just simply possessing Naruto.
@Low: haha yeah i know they both have wings but I don't recall where Priscilla actually flies and it isnt just a jump for super speed. Could you reference the chapter for me? If she can fly then there is nothing saving anyone in FT from her.
She flew in her battle against awakened Clare in the North. Besides, both Priscilla and Teresa are capable of crossing miles in a single step. With this kind of acceleration, flight is nigh useless as they can just leap bounds. However, the dragons are pretty fast in flight seeing as a handful blitzed over 3000 statues scattered across a continent in 5 seconds iirc (that's around 500 statues for each dragon or around a 100 statues destroyed in a second, each taking mountain busting force to go out). But, Terresa and Priscilla are faster still by estimation.