The only problem is after pain arc, the power logic went shit.
As someone said Minato nearly one-shoted Obito, (the guy who obliterated the whole Akatsuki and ridiculised every character who faced him until war arc), saved konoha from bijuu bomb, saved his son ans sealed the kyubi.
Nobody made that much in such short time.
The FTG alone is a one-shot move who can destroy battalions , but since it could anihillate any villian, kishi had to nerf him. ( like he had to up hashirama using lame excuse)
Already fron the appariton of edo madara, the power logic went to the sewer
On fact the only one's who could beat him during war arc would have been madara, hashi, tobi, juubi jinchuriki.