>>987836 (OP)Don't know what on Earth you mean by "underground like in the good old Jojo days", but here's some less-popular manga I've read lately that I can recommend:
Joshi Kouhei
Wakusei Closet
Spectral Wizard
Ogeha
Scientia
Koharu no Hibi
Kokumin Quiz
Hyakumanjou Labyrinth
Ragna Crimson
Kijin Gahou
Paranoia Street
Hyakunichikan
Rojica to Rakkasei
Kasane
Tengoku ni Musubi Koi
Takemitsu Zamurai
7 Billion Needles
Ore wa Mada Honki Dashitenai Dake
Push Man
The Little Match Girl
There's all sorts of stuff there, so see if anything catches your eye.