Use "the" when you are referring to a specific, pre-defined list or a set of recommendations already mentioned.
These long-running series defined the global popularity of the medium: One Piece , Naruto , and Bleach . Use "the" when you are referring to a
Frequently cited among the "best of all time" on Wikipedia are Dragon Ball Z (Fantasy/Comedy), Fullmetal Alchemist (Dark Fantasy), and Fruits Basket (Supernatural). Fullmetal Alchemist (Dark Fantasy)