After I first made the list, I realized it was too long and I made some cut, trying to keep movies that weren't already listed by other posters (like The Godfather for example). Some are my guilty pleasures more than movies I that could be described as great or masterpieces but maybe they'll fit your preferences. Some might be popular, or obvious, choices among other posters too:
. Joan of Arc (1900, short by Méliès)
. Destiny (1921, by Fritz Lang)
. Metropolis (1927)
. M (1931)
. The Most dangerous game (1932)
. Captain Blood (1935)
. The Adventures of Robin Hood (1938)
. The Lady Vanishes (1938)
. Gone with the wind (1939)
. The Wizard of Oz (1939)
. Fantasia (1940)
. The Grapes of Wrath (1940)
. Citizen Kane (1941)
. The Maltese Falcon (1941)
. Casablanca (1942)
. Cat People (1942)
. Double Indemnity (1944)
. Ziegfeld Follies (1945)
. Notorious (1946)
. The Killers (1946)
. Sunset boulevard (1950)
. Rashomon (1950)
. High Noon (1952)
. The Captive city (1952)
. From here to eternity (1953)
. House of Wax (1953)
. Seven Samurai (1954)
. Dial M for Murder (1954)
. East of Eden (1955)
. The trouble with Harry (1955)
. Forbidden Planet (1956)
. Giant (1956)
. Invasion of the Body Snatchers (1956)
. The bad seed (1956)
. Vertigo (1958)
. North by Northwest (1959)
. House on Haunted Hill (1959)
. The Magnificent Seven (1960)
. Spartacus (1960)
. The Manchurian candidate (1962)
. Carnival of souls (1962)
. It's a mad mad mad mad world (1963)
. Goldfinger (1964)
. The Sound of Music (1965)
. For a Few dollars more (1965)
. Cool hand Luke (1967)
. Point Blank (1967)
. The Conformist (1970)
. THX 1138 (1971)
. The Sting (1973)
. Soylent Green (1973)
. The Offence (1973)
. Chinatown (1974)
. The Man who would be King (1975)
. Murder by Death (1976)
. Marathon man (1976)
. C'était un rendez-vous (1976 in France, 1978 in the US titled
Rendez-vous, short by Claude Lelouch)
. Invasion of the Body Snatchers (1978)
. The great train robbery (1978)
. The Warriors (1979)
. Mad Max (1979)
. The Elephant man (1980)
. Outland (1981)
. Mad Max 2 (1981)
. Raiders of the Lost Ark (1981)
. Blade Runner (1982)
. The Thing (1982)
. Koyaanisqatsi (1982)
. The Dead zone (1983)
. One deadly Summer (L'été meurtrier, 1983)
. Dune (1984)
. Starman (1984)
. Body Double (1984)
. Back to the Future (1985)
. Brazil (1985)
. Witness (1985)
. To live and die in L.A. (1985)
. Ferris Bueller's day off (1986)
. Big Trouble in Little China (1986)
. The Princess bride (1987)
. Wall street (1987)
. Less than Zero (1987)
. Dirty rotten scoundrels (1988)
. Glory (1989)
. Do the right thing (1989)
. Black rain (1989)
. Tango & Cash (1989)
. Total recall (1990)
. La femme Nikita (1990, the original with Anne Parillaud)
. Presumed Innocent (1990)
. Reversal of Fortune (1990)
. Hudson Hawk (1991)
. Doc Hollywood (1991)
. Glengarry Glen Ross (1992)
. The Player (1992)
. Carlito's way (1993)
. Philadelphia (1993)
. Léon : The professional (1994)
. Se7en (1995)
. Heat (1995)
. The Rock (1996)
. Misison Impossible (1996)
. Fith Element (1997)
. Life is Beautiful (1997)
. The Game (1997)
. Cop Land (1997)
. Le Dîner de cons (1998, might be hard to find in english)
. The Matrix (1999)
. Cast Away (2000)
. Minority Report (2002)
. Kill Bill: Volume 1 (2003)
. Collateral (2004)
. A History of violence (2005)
. The Prestiqge (2006)
. Severance (2006)
. No Country for Old Men (2007)
. Tropic Thunder (2008)
. Bronson (2008)
. The Hangover (2009)
. District 9 (2009)
A Serbian film (2010) Not really, just messing with you here.
. The Artist (2011)
. Mad Max Fury Road (2015)
. Hateful eight (2015)
. The Lobster (2015)
. I, Tonya (2017)
Sorry for those who have to scroll for an eternity.