I mentioned "North by Northwest." "Rear Window" is good too.
Yeah, Memento is good. Itachi, Agree on the tense dialogue flicks. Love 12 angry men, and what a stellar cast. I'm surprised nobody mentioned any Hitchcock . . . Rear Window rocks!
Another movie that's very well crafted, if rather violent and gritty, is "L.A. Confidential." All the scenes work together to direct the characters to the climax.