>Dragon Ball
Piccolo
Vegeta
Freezer
Cell
Buu
Piccolo Daimaku brought death to some of the early cast of db and shenglong and even though there was a sense of doom that arc ended up leaving a lot to be desire.Toriyama's designs are just iconic, specially when it comes to Cell and Buu, the later had such an amusing design and fighting style in his different forms. However i'd say that only Freezer and early Vegeta rise above everyone. These two stand out for their tenaciousness, pride and malevolent nature, perfect for a villain though Vegeta end up having an off -scream meh redemption for his character and Goku
>Naruto
Zabusa/Haku
Orochimaru
Early Gara
Sasuke
Itachi
4th
Madara
Naruto could easily win this one but there's some conclusions with z bunch villains that just disappoint. Zabuza/Haku and Gara are probably the only ones with a satisfactory conclusion.
Orochimaru was pure terror and a menace when he first appeared, his reappearance in the war is just sad.
Itachi either makes it as the best if you like his backstory, i hate it and it's fucking retarded.
Pain has an amazing saga with suspense, sacrifices and great fights, he redeems himself but modfies his arc into complete shit at the last minute.
Madara was a living legend, the final villain but got ass pulled in the worst way possible.
Pain is just a joke.
Then you have akatsuki. Deidara, Sasori, Konan and Kisame. Only Sasori has a good ending imo
>One piece
Dofla y Croco
Both similar in their settings but with different motives. Ruthless and scheming villains that work as excellent criminal pirates. Even preferring OP, it's truly a pity that there's not even an interesting rivarly in such a long story
>Bleach
Aizen
Ulquiorra
Only Aizen is interesting and is more because for his ludicrous asspulls. Ulquiorra is more remember for the way he was defeated and his transformation