I was going to have you make the thread but eh...
I'm sure I missed plenty in the following list but I got bored by the end. They are not in order of priority.
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Laurence Olivier’s Hamlet (1948)
M (1931)
Ordet (1955)
The Parson’s Widow (1920)
The Passion of Joan of Arc (1928)
Day of Wrath (1943)
La Strada (1954)
8 ½ (1963)
Sayat Nova (1968)
Battleship Potemkin (1925)
Modern Times (1936)
City Lights (1931)
Sherlock, Jr. (1924)
Sunrise (1927)
City Girl (1930)
Tartuffe (1926)
To Have and Have Not (1944)
Casablanca (1942)
The Sea Hawk (1940)
The Black Pirate (1926)
Captain Blood (1935)
Maltese Falcon (1941)
Playtime (1967)
Mr. Hulot's Holiday (1953)
Sword of Doom (1966)
Throne of Blood (1957)
Hidden Fortress (1958)
Yojimbo (1961)
Sanjuro (1962)
Seven Samurai (1954)
Satyricon (1969)
La Dolce Vita (1960)
The Grand Illusion (1937)
The Rules of the Game (1939)
The Golden Coach (1953)
Night of the Living Dead (1968)
Nosferatu (1922)
2001: A Space Odyssey (1968)
Paths of Glory (1957)
Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb (1964)
The Killing (1956)
Les Diabolique (1955)
Jenny Lamour (1947)
Wages of Fear (1953)
Night of the Hunter (1955)
Treasure of the Sierra Madre (1948)
Double Indemnity (1944)
Sunset Blvd. (1950)
Dark Passage (1947)
The Big Sleep (1946)
Touch of Evil (1958)
The Magnificent Ambersons (1942)
The Trial (1962)
Citizen Kane (1941)
Rear Window (1954)
Psycho (1960)
Vertigo (1958)
North by Northwest (1959)
Metropolis (1927)
It Happened One Night (1934)
The Hustler (1961)
A Streetcar Named Desire (1951)
The Silence (1963)
Winter Light (1963)
Through the Glass Darkly (1961)
The Virgin Spring (1960)
Blowup (1966)
L’Avventura (1960)
Story of a Love Affair (1960)
Le Voleur (1967)
Elevator to the Gallows (1958)
The Thin Man (1934)
The Golden Age (1930)
Casque d’Or (1952)
400 Blows (1959)
Andrei Rublev (1966)
Oliver Twist (1948)
Band of Outsiders (1964)
A Woman is a Woman (1961)
Haxan (1922)
Cabinet of Dr. Caligari (1920)