I also say Subzero. From a strictly footsie point of view, Sub breaks the rules of footsies because he can essentially be in two places at once because of the ice clone. Worse yet, he makes other footsie characters afraid to play footsies with him. They either want to be far far away chucking things at him, or right on top of him rushing him down, but sweep distance to half screen? No one wants to fight Subzero from there.