Gonna get flames but: Lol I feel like nobody mentioned tsunade. Honestly. If Sasuke is fighting 5 hokage with his present level w no bijuu. And this wasn't an entire group effort like everyone is staying close to minato and tobirama so they can be teleported the whole time out of harms way, Sasuke gets this high mid dif then Amaterasu solos hiruzen and tsunade assuming they both can't sense or see it coming. Naruto is the first character to be directly hit and to be able to brush it off. As for tobirama and minato I don't think they can teleport the flames away, but teleporting them can only get so far and Sasuke can Amaterasu the kunais they mark or could spam yasaka magatama to just level the whole area in black flames, that would possibly kill hashirama if he can't absorb it. Then that leaves tobirama and minato, I think he would just need to be using PS and all rinne abilities to win against two FTG users. Sasuke himself said that everyone who could stop him (the 4 hokage) are out of his way