Log Horizon was and still is by far the best isekai anime up to date (april 2021). When first aired, it chenged the game and convinced me that there are intelligent isekai and not all of them are poorly developed clones. Overpowered abilities? Heroes with simple goal who push forward no matter what? Thanks, we don't this here. Log Horizon is one of the few anime series that show development of every character and development in this case doesn't mean "new skills" or "new equipment". Each character grows as a person and the story is not just "side vs. side" but characters and their beliefs colliding. Ifyou ever give up on an isekai genre, go watch Log Horizon — it will bring you back to life.