I’d probably need to go with Madara Uchiha from Naruto Shippuden.
There is no character in the Naruto franchise that sustained such dominance over the cast and lore as a whole; his motivations as a villain were justified and the way he executed his attempt was beautifully done up until he probably absorbed the Ten Tailed Beast.
His powers are extremely interesting, and in the context of the series, they are pretty overpowered. His combative intuition was also astounding.
The Ghost of the Uchiha’s gotta be my pick. Too badass.