One Piece has sold the most, however it is not as popular to non anime fans. Nothing on this list can compare in that regard to Dragonball. The only true competition is Yugioh and Pokémon.
My two favorite series ever. One piece has better storytelling, world building and incorporation of side characters. There's just something about the pure entertainment factor of Dragonball though, no series has Ever matched the level of Hype it is capable of producing. I have DB ranked 1, OP 2
