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.