Just listing few of my reading list that I think might be underrated by some but IMHO it is worthy to spend some time to read.

Hinamatsuri
Otoyomegatari
Kimi no knife
Auroboros
Otogi Matsuri
Black Joke
boys on the run
Yuureitou
Shin Angyo Onshi
Sidooh
Skyhigh series (Shinshou, Karma, 4)

Most of the manga that I listed is in Seinen genre so mmmyeahhhh u know the drillz