I'm surprised you guys actually tried to count summons in the fight. Its like counting naruto's shadow clones, pretty much pointlessly misdirecting for no reason other than to go "nah-uh" even though its pretty clear that not only are they just absolute cannon-fodder(below that even) opponents, they don't even play into this fight at all.
The people in this fight:
Midara, Obito, and if you are really desperate: the ten tails.
The entirety of the other nations.
Really, in a show like naruto(not epic-like), who the fuck would root for the good guys?
-Epic like as in grand in scale. Naruto has always been a small group fight at best.