Sasuke.
"High Jounin at best" Rofl. SM doesn't close the gap; you all seem to forget that Sasuke's speed, strength etc. are solely from his body, and not from chakra modes - he was easily going toe to toe with RSBM Naruto and Juubidara with those physical capabilities, so there's no way SM can even keep up.
Sasuke without doujutsu still has Katon, Raiton, Kenjutsu, Bukijutsu, blitzy foot speed and Kage Bunshins himself. Ma and Pa fusion? Never actually happened. Naruto has more power, but Sasuke's got the benefit of his physical abilities being sourced from his own base body, and his skills are much more refined.