In the Great Pirate Era, these two were at the pinnacle of strength and, in many ways, at the top of the era, following a Whitebeard. Shanks only rose to the position of Emperor 6 years ago.

And to make matters worse, could Whitebeard have hinted at this theory long before it gained momentum? This theory is supported by the encounter between Shanks and Whitebeard in chapter 434.

Legends such as Whitebeard have praised Shanks as Haki on many occasions in One Piece, but, if that isn't praise enough proof enough of Shanks’s Haki being the greatest in the series ...