Hi anons... I was hoping you guys might be able to recommend me a manga similar to the types I've read so far. There are a few outliers in my collection but I want to focus on a specific genre here so I will make a list of ones I've read to help with the association.

01) The Flowers of Evil
02) Battle Royale
03) Death Note
04) Parasyte

(similar anime to also help with the genre)

01) Death Parade
02) Paranoia Agent
03) Serial Experiments Lain
04) Erased
05) Chobits
06) Welcome to the NHK
07) Black Butler
08) Steins Gate
09) Terror in Resonance
10) Ajin

(and some tv shows and films)

01) Midnight Diner
02) Old Boy, Vengeance series
03) Squid Game
04) Alice in Borderlands

So hopefully these give a tone of what I'm looking for. I've watched many but decided only to list very specifics that help define the kind of story I'd like to find. Some are light hearted, but all of these have dark themes, psychological aspects, intensive detective stories, can be surreal and twisted. Apart from some, I'd say the of the most well written out there.
I would really appreciate any recommendations from either medium really. TV, Film, Manga it's all good to me.

Just to explain, I've seen so much so going through top lists and archives on database sites it's really revealing anything new or worth looking at. If you guys have any strong recommendations of this sort of genre I would really appreciate it :)