Come to think of it, I don't read a lot of sci-fis so I might not be much help:
Jojo's Bizarre Adventure: I noticed you said you're frustrated with the state of Western comics and I feel this could be an antidote as it's about people with superpowers trying to outsmart each other.
Bloody Monday: Conspiracy thriller.
Delicious in Dungeon/Dungeon Meshi: A fantasy series with substance that manages to be a hit with RPG fans, fantasy fans and cooking fans.
Level E: Alien comes to Earth to study the planet but likes to troll people.
Steins;gate: College students accidentally invent time travel and it puts a target on their backs by a conspiracy. I can only vouch for the visual novel or the anime so I'm not entirely sure if the manga adaptation is just as good.
Psycho-Pass: You ever seen the movie Minority Report?
Fist of the North Star: Bruce Lee is dropped into a Mad Max world (not literally) and murders bad guys.
Case Closed and Kindaichi: This was mentioned earlier so I'll add my two cents. They are murder mystery detective series and the latter was clearly written by Columbo fans.
Attack on Titan: Bit of a divisive title because of the direction it went midway but I think it's a decent action romp.
Pop Team Epic: 4 panel shitpost series, no real plot.
Berserk: Dark fantasy. There's explicit content but not in a fanservice kind of way.
Yotsuba: Light hearted series about a kid going through life discovering new things. You can rest easy that this is not a lolicon series.
Chi's Sweet Home: Another light hearted series about a cat trying to find her mother but gets adopted by a family. I recommend this to anybody who likes cats.
With the Light: A drama series about a mother raising an autistic child. I feel like I have to recommend this for obvious reasons.
Detective Conan (released as Case Closed in some English-language countries for whatever reason).
Don't be fooled by the cute kids on the cover. It's a murder mystery series, and sexual content is borderline nonexistant. So if you like murder mysteries, you will like this.
There's another murder mystery manga (not by the same author) called the Kindaichi Casefiles, which tends to have more intelligent mysteries, but unfortunately its worse than Conan in other areas (most notably, it has more pervy content and characters who are closer to standard anime archetypes). I like both but there is definitely a feeling of "trade offs" when going from one to the other.
While I will not deny that Kindaichi has fanservice, I don't think the fanservice is that distracting. At least I hope not to the point it would turn away OP.
All You Need Is Kill is a good, quick sci-fi series.
Hadn't heard of this one before. It's neat so far.
In case anyone is curious, All You Need is Kill was adapted as the live-action film Edge of Tomorrow with Tom Cruise.
![LinkinParkxNaruto[AMV]](http://uploads.kiwifarms.st/data/avatars/l/61/61177.jpg?1699571951){kind=avatar}
happened. Reread it earlier this year and it was as good as i remembered it, the artwork is out of this world.
![My Name Is Shingo v03 c003 Program 3 [Consciousness] - 253 [Gantz Waitingroom].webp](/proxy.php?image=https%3A%2F%2Fuploads.kiwifarms.st%2Fdata%2Fattachments%2F7742%2F7742407-01fb62f2a29db48b38088d63aec76a8b.jpg%3Fhash%3DShtYnmn-9A&hash=e9c619c9a7479bf7c4ad6d6dc9f26cab "My Name Is Shingo v03 c003 Program 3 [Consciousness] - 253 [Gantz Waitingroom].webp")