Polanski was a good mood setter in his early films.
Of the films that creeped me out as a kid I remember Shock Waves, with Peter Cushing, John Carradine, and Brooke Adams.

Water-logged Nazi zombies. Good stuff.

'Knife In the Water' and 'Repulsion' were good films.

Most of these are going to be pretty well known but most of the best films are.

Once Upon a Time in the West
The Third Man
The Night of the Hunter
Judgement at Nuremberg
The Hustler
The Manchurian Candidate
The Spy Who Came in from the Cold
The Sand Pebbles
Z
The Last Picture Show
The Day of the Jackal
The Stunt Man
Southern Comfort
American Pop
Runaway Train
A Fish Called Wanda
Ran
Once Upon a Time in America
A Bullet in the Head
The Killer
Hard Boiled
The Aristocrats
Running Down a Dream (Peter Bogdon...however you spell his last name, Dorothy Stratten's white knight wannabe who directed The Last Picture Show's documentary on Tom Petty & the Heartbreakers)

In the case of all of the above go with the original and stay away from fecestastic remakes starring Denzel Washington, Bruce Willis or Slyvester Stallone.

Now I am assuming you have already seen the following.

The Maltese Falcon
The Treasure of the Sierra Madre
The Bridge on the River Kwai
Lawrence of Arabia
It's a Mad, Mad, Mad, Mad World
2001: A Space Odyssey
The Searchers
The Wild Bunch
Patton
A Clockwork Orange
The Godfather
Chinatown
The Godfather Part II
Jaws
Marathon Man
Pulp Fiction
The Usual Suspects
L.A. Confidential
Monty Python and the Holy Grail
Blazing Saddles
The Last Waltz
GoodFellas

because who hasn't? If not then I hereby sentence you to a double feature of St. Elmo's Fire and Wall Street with audio commentary tracks of FatBloodyFingers giving a dissertation breaking down how these films represent the exploitation of the poor and middle class by the economic policies of Ronald Reagan and the amorality of the parasitic Yuppie scum of the 1980s.

That's a solid list, unknown pervert.
I call attention to the Third Man - also on my list. That's one film that makes me moody for days.

I'd include - Touch of Evil. Forgot to add it earlier.

Agreed. TUP's list has many of my favs on it- Night of the Hunter, Last Picture Show, Mad Mad World. Just press the button marked booze!

Touch of Evil and Night of the Hunter are two of my top movies of all time. Along with the original Day The Earth Stood Still. I have original film posters of these hanging in my home.

Reminded me, The Crying Game

Last Picture Show was great. The Third Man has the best ending to a movie in cinema history.

Forgot about Touch of Evil. That one should have made my list too.

I'm generally much more fond of the films from the 50s through the 70s. A little less fond of the 80s and 90s though I'm not a grumblepuss about them. I am a grumblepuss about the vast majority of movies made in this century though. Fucking shitty remakes of good to great 1960s and 1970s films (Taking of Pelham 123, The Manchurian Candidate, Straw Dogs, etc.), fucking shitty remakes of 1970s television series (Charlie's Angels, Starsky & Hutch, etc.) and fucking stupid zombie movie after stupid zombie movie after stupid zombie movie.

It's Afghanistanimation!

There was a passle of us us riding home from seeing Rob Zombie/ Godsmack the other nite. Hit a Carl's Jr. on the way home. Someone ordered a "liter of cola". Things went down hill pretty quick.

Aliens
Dark City
Fargo
Jeremiah Johnson
28 Days Later
28 Weeks Later
Lawrence of Arabia
Seven

must see.