Anything with Alec Guiness in it is always worth a go.
Maybe we need to expand this out to include plays (playwrights, screenwriters) and other great works of literature; then I could mention "The Caretaker" (Harold Pinter - 1960) and "The Browning Version" (Terence Rattigan - 1948). But, there again (and going back a little further), perhaps Niccolò Machiavelli would also deserve an honourable mention!
