Is the Third Raikage the strongest Kage of all time? I have strong reasons to believe so.
1) As most of you may know, he was know as the human shield, his defense was indestructible. Nothing was known to actually pierce anything, except for one thing that I'll get to later. Even the Hachibi, arguably the 2nd Stongest Tailed Beast, could not pierce through his shield.
2) He has, as most of the Raikages, super human speed. He's as fast as the current Raikage, A. Please, take note that the only person fast than A was Minato. Still, The Third Raikage was even stronger than A. No doubt.
3) The Jigo *Kudzuki Yonhon Nukite, also known as the hell stab, similar to the chidori, but only stronger. The Third could also seal the Hachibi after every time it would go out of control....by himself. By doing that he would use the sealing technique:
Kohaku no Jōhei.
So the Third had the lightning release armour, knew lightning release, took on th e Hachibi, he knew Black Lightning ( this is whom Darui learned the technique from, took on 10,000 shinobi single-handedly, he uses the hell stab; the only weapon able to penetrate his Lightning Release armor, and a Rasen-Shuriken couldn't even penetrate his shield.
So now the only people I can see beating the Third Raikage are Hashirama, just because, well, he's the person Madara has the most toward, acknowledging him as his better. And Minato, only because he's faster and specializes on wind-release techniques.
But anyways, if any of you can prove me otherwise, please, bring it. :3