If anyone hasn't watched One Piece, the please check out Whitbeard's fight with Akainu on Youtube... He is an epic old man!

"He is an epic old man!" No kidding. And after all that attack on him, dude died standing and with dignity.
But I'm going to go with Yamamoto because of his bankai. Shame that he died (if he is dead) in a dumb way.

In a fair fight, anyone versus Yamamoto will die miserably.

duh......u need to ask..................

I think whitebeard cause it took A LOT of the marines and warlords to kill whitebeard and even when he died he stood tall. While yamamoto nearly died just from Aizen and nearly died AGAIN from just Kageroza. Besides whitebeard had the Gura Gura no mi fruit.With the power of this Devil Fruit, Whitebeard was able to create powerful shock waves by shattering the air like glass. These shock waves then would be redirected into the ground, resulting in earthquakes and, if under the seafloor, tsunamis. He has been shown to create such quakes even in the air, rendering airborne attacks ineffective. Whitebeards devil fruit has considered the strongest Devil Fruit within the Paramecia class. According to Sengoku, Whitebeard had the power to destroy the world.