Hashirama is the 2nd strongest Ninja in the Naruto world with 1st being Madara. Hashirama is laik dem trees guy. He's the only Ninja with that strong type of wood techniques so he would be veby veby strong.
BUT GUESS WHAT
PLOT-NO-JUTSU WILL MAKE NARUTO WIN!
So in the end Madara is the strongest but something will happen.
Wait did you just say Madara is the strongest ninja next to Hashirama? Hashirama is way stronger than Madara. Madara practically idolizes him.
Hashirama Senju AKA the 1st Hokage was able to take down both Madara and the Kyuubi at the same time. He's also the only NATURAL known wood-style user to date. he has the power to suppress tailed beasts.
The only reason:
Yamato has wood style
Obito was able to survive
Tsunade isn't as useless as she should be
Danzo was more useful as he should be.
Even in his resurrection form he took down all 5 kages and is looking for a fight with naruto and bee.
And he is the only character strong enough to stand against hashirama.
Well actually, if you look at it, Madara would've died many times in that fight. It is because of the Impure World Resurrection jutsu he survived. To counter that, his mentality at that time could have been to fight sloppy, not trying to dodge all of their attacks; knowing that he can't be killed. Madara didn't have to unveil his all of his skills to kill the Kages, making the assumption that his proficiency is very high.