Suggest me some good iunderrated sekai animes 1) which doesnt focus on harem building or fanservice( i could bear with some if the story is good) and 2) has an adventure kinda theme.

Im pretty much a light anime watcher and when i started the isekai genre i instantly started enjoying them but as i continued new animes of the genre, i could only find animes that only focus on building harem or every female in the universe falling for the mc. But I enjoy the adventure parts of isekai anime.