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: "Here are popular anime series and manga recommendations I promised you." Essential Recommendations Frequently cited among the "best of all time"
These long-running series defined the global popularity of the medium: One Piece , Naruto , and Bleach . Fullmetal Alchemist (Dark Fantasy)
If you are looking for actual recommendations, these titles are widely considered the gold standard across the industry: Frequently cited among the "best of all time"