I don't see anyone ever talking about Hellsing. Why I enjoy it, it's edgelord but with a heart of gold. I love the factions that fight against each other in this secret war that involves the paranormal and vampires in modern day. It's got guns and magic and the art is good.
Another one I like is Ragnarok (into the abyss is the english title). It's a manwha by the korean artist behind the game with the same name. Again another little edgelord romp with a heart of gold, I see a pattern. Plus again I enjoy the art and it reminds me of old school 90's anime schlock with katanas and magic powers that I fell in love with as a kid.
Paperakyu, sometimes stylized as PaperaQ, is a somewhat crudely drawn and very existential story about a kid who gets infected with a disease that turns his head into a melon-like crab. It is also the only manga I have ever read that directly and explicitly condemns the Japanese government for keeping its heinous butchers in charge after WW2. I'm not sure if it ended.
PTSD Radio is the only horror manga to successfully jumpscare me, which it accomplished multiple times, and in general takes many tricks and stylistic elements from film, generally to its benefit. Ever wonder what would happen if some scavenging animals dug up an idol of an angry, ancient god of hair? No? Well, perhaps now you are.
higurashi is in large part about how japan hasn't properly reckoned with all the war crimes from ww2, especially unit 731
wrt paperakyu: it is finished. the final chapters are available from the author's salepoint on itch, here is the link (used to be gumroad). it's good, worth the price to see the resolution (source: bought it and read it)
and here's the mangadex for the first volume and a half (link)
and for those of you that need a little oomph to check it out: chapter 1 page 17 (it's officer dogface!)