Ajin, Attack on Titan, Darling in the Franxx, The Promised Neverland, Steins;Gate, Death Note, Psycho Pass, Castlevania, Kill La Kill, DOTA: Dragon's Blood, Code Geass, Akame Ga Kill, Kill Bill (the actual movies), Deadman Wonderland, Durarara!!
I haven't watched either of those shows, and I can't really say that it is the genre I usually consume, but wanted to mention that you might get more answers on either [email protected] or [email protected].
As for thrillers I have seen or heard good things about, perhaps Death Note (if you haven't seen it yet)? I haven't seen this one, but I have heard good things about Psycho-Pass as well which seems to have some similar themes based on the synopses.
Both are really good, Parasyte is probably one of the best horror animes available, Tokyo Ghoul has two really good seasons and then things get a bit confusing.