Influence the world!

For reasons that shall remain unstated, I need to know what movies are very good psychological thrillers. My thought with that is a movie that is well-crafted and acted (preferably) and has a strong plot (James Bond is not what I am looking for, whatever IMDb says). I would like the violence kept to a minimum, and to be isolated instances (I'm thinking of Heat here, or Fight Club, though I don't know if those movies actually qualify as psychological thrillers). I don't know, for example, if something like The Ring is a psychological thriller or if it's more into out and out violence, because scary movies scare me, and then I have a morbid imagination anyway, so I get no sleep, and that's all very bad.

Movies I'm thinking of so far:
Fight Club
Heat
Mystic River (I've read the book, anyway)
Misery (I've seen part of it)
Donnie Darko
The Sixth Sense (which I haven't seen, but should)
Rear Window
The Birds

What I need is to get as large a sampling of movies that I've seen as possible, so don't limit yourselves, seriously, because chances are, I probably haven't seen it. Or tell me what makes a psychological thriller to you. I'm trying to determine what would compose Standards of Content (I can work with anything up to an R rating, and bear in mind that literature can go a bit more graphic than movies) for, um, something I'm working on. I want to get more into crafting horror out of psychological violence than out of Yet Another Blood-Soaked Abattoir And Later There Will Be A Sword Fight. But I'm not sure where the line should be, where violence is necessary to create horror, and where horror is created without violence at all; that's why I want movies, because I am drawing a big ol' blank.

Also, if you can think of a PG movie that is seriously likely to fit into this category, tell me, because I'm trying to come up with something that maxes at an R rating, rather than movies that are R rated and are scary. I would seriously prefer to create horror without violence, because I find that more frightening than blood everywhere, which sickens me after a while.

I am not interested in sexual content or profanity at all; those are pretty easy to sort out, as I've refused to deal with vampire erotica (which pretty much means no sexual content or else I wind up arguing again that I don't want to be on the Anne Rice Laurell Hamilton bandwagon), and most profanity would be an anachronism (and it sounds silly to keep cursing in Bulgarian just for the sake of having curses.)