ID:Invaded (mystery, thriller, serial killers. Very immersive imo)
Hoshiai no sora (cute slice of life spokon but it gets darker as the chapters go on)
Kekkai Sensen (2 seasons; 12 chapters each. The characters are really funny and the show is in general very entertaining.)
I've seen people mention 91 days and I totally recommend it too.
Hope ......