Hashirama died during a great ninja war... Who could have killed him? Ask yourself, the God of shinobi killed by fodder? Thats exactly what happened.
Tobirama died during a great ninja war, the one in which he named Hiruzen the Hokage before his death. Who killed him? Fodder, although his team were pursued by elite kumo ninja, he died by ordinary means.
Hiruzen died during his fight with Orochimaru, he was not defeated, he took the easiest way out, because if not he'd hafta kill Orochimaru and we all knew his heart wasnt into harming his most loved student no matter how much he tried to convince himself otherwise. So he took his arms twarting his plans to destroy the leaf... He fought through 2 great ninja wars, and survived both, sensei to the 3 legendary shinobi of Konoha, this man mastered every tech in the hidden leaf... During his lifetime he was said to be the strongest living Kage, point is, his feats make him a legend.
Minato died during his fight with Kurama, he was not defeated. He used the Reaper Death Seal, which takes the life of the user right after the jutsu has served its purpose.
Tsunade's status is unclear at the moment, but given her abilities, she cannt be killed by ordinary means. I mean even Madara took this into consideration and decided to remove her legs. With her being immobile, killing her wudnt be necessary.
We know nothing of Hashirama's life or what he's done except create the Hidden leaf and fought Madara... Big deal, we take this small details nd make the biggest fuss about them. But what we do know of Hiruzen, we dnt take seriously? C'mon, it doesnt make sense, if Kishi said Hashirama was inferior to Tobirama, i wouldnt be surprised if the entire base sucked it up nd ran with it. In my opinion, Hiruzen is still God Of Shinobi, but who's to say there hasnt been more than one?
