From those that I remember watching, some are shit and some are engaging, I'd suggest picking those that you like and looking at recommendations in MAL.
Beck
White Album 2
Nanna
Kuzu no Honkai
School days
Yosuga no sora
Golden Time
Orange
Kimi ga Nozomu Eien
True Tears
Myself; Yourself
Kimi no Iru Machi
Suzuka & Fuuka
Ao Haru Ride
3-gatsu no Lion
Oregairu
Genshiken
Oniisama e...
The Rose of Versailles
These have larger themes and events that the characters have to play to, but still have the angsty emotionally-self-harming horny teenager drama with sex/implied sex too
Mawaru Penguindrum
Darling in the FranXX
Zetsuen no Tempest
Zankyou no Terror
NGE
Shinsekai Yori
Kakumeiki Valvrave
Future Diary
FLCL
Aoi Bungaku Series
Parasyte -the maxim-
Guilty Crown
Romeo x Juliet
Gantz
Btooom
Hai to Gensou no Grimgar
Grisaia no Kajitsu
Aldnoah.Zero
Phantom: Requiem for the Phantom
Personally moved on from this type being my favourite to just dark/edgy/depressing stuff, I think you'll probably take the same route kek. Once you do, check these out.
Claymore
Berserk (old series or movies)
Elfen Lied
Ergo Proxy
Shadow Star Narutaru
Gilgamesh
Speed Runner
Texhnolyze
Angel's Egg
Perfect Blue
Blood the last vampire
Paprika
Le Portrait de Petit Cossette
