Sasuke. Itachi would be at second place after a certain margin because of this: He hoodwinked Orochimaru in part one with Fuma Shurikens and flew, used Chidori spear and cut off the wing of Deidara's Dragon's wings all the time he controlled the large Fuma Shurikens and then stabbed them straight into Deidara's arms as well. He also used Shurikens faster than Itachi could make hand-seals.
That is crazy skill with the Shurikens.
Come on, man. It's Sasuke. He hoodwinked Orochimaru in part one with Fuma Shurikens by creating an elaborate trap with them and flew, used Chidori spear and cut off the wing of Deidara's Dragon's wings all the time he controlled the large Fuma Shurikens and then stabbed them straight into Deidara's arms as well. He also used Shurikens faster than Itachi could make hand-seals.
Throwing Kunais all over the place, without any precise target means great Shuriken-Jutsu? Yeah, okay.