Most influential/important/iconic horror films?

As we approach the autumn, I'm looking to compile a somewhat comprehensive list of horror movies that might be worth the time of any budding aficionado. From Halloween to Hereditary to Hell House LLC, which ones are must-sees (or at least heavy recommendations)?

Some suggestions from the comments already:

  • 2010s
    • Get Out (2016)
  • 1990s
    • The Blair Witch Project (1999)
    • Scream (1996)
    • Seven (1995)
    • Silence of the Lambs (1991)
  • 1980s
    • Aliens (1986)
    • The Terminator (1984)
    • Poltergeist (1982)
    • The Thing (1982)
    • The Shining (1980)
  • 1970s
    • Alien (1979)
    • Halloween (1978)
    • Jaws (1975)
    • The Exorcist (1973)
  • 1960s
    • Night of the Living Dead (1968)
    • Rosemary's Baby (1968)
    • Psycho (1960)
  • Pre-1960s
    • Frankenstein (1931)
    • Nosferatu (1922)
    • Cabinet of Dr. Cagliari (1920)