Which MMA fighters could compete in Boxing?

Can you guys think of any MMA fighters that would be able to compete at the Highest levels of Boxing? Quite frankly, I can't think of anyone - but if I had to choose someone, It would probably be a tossup between Overeem/Dos Santos/or Vitor...only due to their Athletic prowess, not their technique. I think if they dedicated a lot of time to it they might find some success - but I still doubt their chances. What do you guys think?