I will go with Jiraiya, even though we do not know EMS effects, yet Tobi said that it opens one more jutsu.
Everything Sasuke can do is avoidable in SM, well i believe that Sasuke pretty much cannot do anything against fully powered Jiraiya. Genjutsu upped significantlly, power, speed everything is top level, chakra levels unimaginable...
Sasuke has what he has. 4 really good jutsus, everything else in a bit shaky. Kirin, Amaterasu, Susano'o, Tsukiyomi, meanwhile Jiraiya had whole chunk of jutsus, ranging from close to long range combat.
Danzou was twice as worse fighter as Jiraiya (izanagi wasn't that much of a jutsu), which only proves how powerful was Pain.