Some of my favorites:
The Warriors (as mentioned)
Hopscotch (Walter Matthau is a CIA agent about to be put out to pasture, so he blows the lid off all the dirty tricks by writing a book. He sends the chapters to his publishers one at a time, always staying a step ahead of the CIA who’s chasing him – it’s pretty dated, but Matthau gives a good performance in my opinion, and there are some damned good lines: “Now I know what FBI stands for: Fucking Ball-busting Imbeciles!” “Who’s that photographing us?” “Oh, that’s Follett, he’s an idiot. Probably no film in the camera.”)
The Hospital (George C. Scott)
Network
The Seven Ups (a sort of unofficial sequel to the French Connection – sans Gene Hackman, but stars Roy Scheider. It has, in my opinion, just about the best car chase ever filmed.)
Deliverance – it’s more than just the rape scene.