The "Grandfather of Isekai." It has controversial elements (the protagonist is morally grey), but the world-building, animation quality, and character growth are second to none. It is The Lord of the Rings of Isekai.
These series are commitments, but they offer rich worlds and incredible payoffs. Hentaied 24 07 26 Bunny Brownie And Matty Mila ...
Art by Takehiko Inoue ( Slam Dunk ). Every panel is a literal ink painting. It is not about fighting; it is about becoming "invincible under the sun," mastering ego, and understanding death. It is high art, not just a comic. The "Grandfather of Isekai
Subaru Natsuki is summoned to a fantasy world, but he has no overpowered abilities. His only power is "Return by Death": when he dies, he resets to a "save point," retaining all the trauma and memories of his gruesome deaths. Art by Takehiko Inoue ( Slam Dunk )
While anime is great, many of the best stories are only in manga form.