According to Wikipedia's list of best-selling manga , One Piece leads with over 500 million copies sold, followed by classics like Doraemon and Case Closed (Detective Conan).
Use "the" when you are referring to a specific, pre-defined list or a set of recommendations already mentioned. According to Wikipedia's list of best-selling manga ,
Use this when you are providing a list or referring to the category in general. Fullmetal Alchemist (Dark Fantasy)
If you are looking for actual recommendations, these titles are widely considered the gold standard across the industry: According to Wikipedia's list of best-selling manga ,
Frequently cited among the "best of all time" on Wikipedia are Dragon Ball Z (Fantasy/Comedy), Fullmetal Alchemist (Dark Fantasy), and Fruits Basket (Supernatural).
Example: "I am looking for popular anime series and manga recommendations."