The first you said, well in return. Rinnegan gives you the abilitie to control all basic elements, and we all know Mokuton has weakness; Fire/Enton and lighting. Shinra tensei can destroy the wood, and preta path can suck the life inside it (Ying chakra if I remember right).
Obito has 7 tailed beast, Rinnegan, gedo mazo and Kamui. Combine that together and you have a monster. Wanna look even more dumb?
Then you have readed wrong, because Minato said this ''His space time ninjutsu is better than lord second and mine as well'' - and I can prove you why Minato has better. Minato can teleport, and teleport is faster than speed it self. If Tobirama had better then he should just escape the 20 elite ninjas that killed him?
And yet you forget that Mito helped Hashirama in the fight. Hashirama can surpress chakra, that is why he had the benefit of fighting Kyuubi and Madara. However like I said Nagato and Obito can defeat Hashirama.
Indeed Tobirama can use Edo tensei... but you never know how he revived people. Maybe they just were weak? Or maybe he only revived people's soul with the Edo tensei? Orochimaru made it perfect so you cannot say he can use Edo tensei like Orochimaru and Kabuto can. And yes he have to do handsigns to create his water, however all of that is useless when you fight a Rinnegan user.
Tobirama using sage mode because his brother can? Ok, then I can say Obito can create the moon because Rikudou sennin was able to do so. Stupid right?
Naruto did defeat Six paths of pain with a lot of help from the Kyuubi, however Six paths of pain is a part of Nagato's jutsu so he did not defeat Nagato. Jiraya defeated one of six, and died. Konohamaru didnt even defeat one because that one got revived by naraka path.