Nagato was too inexperienced but a good fighter and rinnegan user. though Hashirama, don't forget, was really close to the SO6P just like Madara. They are both his ancestors. I mean the Wood style he has is of a great power and can tame beasts. wood coming out of everywhere spamming and attacking other paths is amazingly strong and a fast technique. even if tensei is used, wood can still come out of nowhere in no time. plus hashirama had a lot of fighting experience and a clear mind, was calm, and concentrated judging from his looks xD and please don't bring up yamato please. he's a loser compared to what we've seen from hashirama.
Look at the size of one of his jutsus. Hashirama is like a tank.
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