I think without fillers, Naruto is the winner. However, considering fillers and overall, I say the best are: One Piece, Naruto and then Bleach. One Piece is absolutely amazing but it can go at a slow pace in certain story arcs. Naruto was exceptional but the months of fillers that started last year destroyed the anime for me and caused me to start reading the manga. Bleach is awesome but I hate how it is just battle after battle, I love stories and adventure in Which One Piece and Naruto are better.