[Duyere]

Why are you comparing One Punch Man to either of those two? Not nearly as popular. You should have added Bleach, Toriko, Hunter x Hunter, Katekyo Hitman Reborn Dragon Ball Z, or YuYu Hakusho up there.

But between Naruto and One Piece, I would have to go with One Piece. Naruto may have been animation but One Piece has less filler and overall a more promising storyline. The arcs may be ridiculously long but it has little-to-no filler overall.

[Diamondo]

Of course that for me would be Fairy Tail 👍

Also I love old One Piece and One Punch Man in the same way, but I freaking hate the new One Piece after that time skip. Everything is just for fan service and so ugly. And right after that is Naruto, but I hate its fillers. So I guess: One Piece = One Punch Man > Naruto, but I think I love all of them in the same way.

[Denomination]

One piece all the fucking way, has way better lore.