The General (1927) -- Back when actors had to do all their own stunts & specials
   The Charge of the Light Brigade (1936) -- Got the ASPCA involved in the movie biz.
   Lost Horizon (1937) -- Or you could just visit Ojai
   Beau Geste (1939) -- Mystery, war & romance

   The Maltese Falcon (1941) -- "The stuff dreams are made of..."
   Casablanca (1942) -- The whole world at war for a PR campaign
   Ox-Bow Incident (1943) -- "All but seven"
   And then there were None (1945) -- A true mystery
   The Treasure of the Sierra Madre (1948) -- "Badges!?"
   Kind Hearts & Coronets (1949) -- May be the multiple role record.

   Sunset Blvd (1950) -- THE movie about Hollywood
   DOA (1950) -- Film noir 101
   The Thing from Another World (1951) -- Only the first part of Campbell's story but, far superior to Carpenter's full remake.
   The War of the Worlds (1953) -- Illegal aliens invade Los Angeles!
   1984 (1956) -- Room 101
   Forbidden Planet (1956) -- The alpha & omega of sci-fi.
   Invasion of the Body Snatchers (1956) -- Low $$, high impact.
   The Bridge on the River Kwai (1957) -- A study in war
   Witness for the Prosecution (1957) -- Way beyond Matlock
   Vertigo (1958) -- Alfred Hitchcock in his prime 

   Psycho (1960) -- Never rent room 1...
   Dr. No (1962) -- The first, and likely the best, of the Bond movies.
   The Manchurian Candidate (1962) -- Care to play a little solitaire?
   Dr. Strangelove (1964) -- We think this is a comedy...
   Goldfinger (1965) -- The only supervillian who ever considered the bottom line.
   The Good, the Bad & the Ugly (1966) -- A strangely great spaghetti western.
   The Wild Bunch (1969) -- The way westerns should be made...

   Star Wars (now retitled Episode #4) (1977) -- The first 37 seconds are the zenith.
   Raiders of the Lost Ark (1981) -- Powerful casting of Nazis vs God.
   Body Heat (1981) -- The best film noir since the '50's.
   Ghostbusters (1984) -- "They hate that!"
   Predator (1987) -- Don't talk, just shoot. 

   Groundhog Day (1993) -- Imaginative way to use every take.
   The Usual Suspects (1995) -- Writing still counts.

...and you may infer from this assortment that I'm not enamored with remakes & sequels.  Bad news for Disney, Lucas & Spielberg.  :-)