Do you know movies from the 1920-80s (I prefer mainly black and white), where there are the following themes (details inside)?

Straw Dogs

Alien and The Thing.

Yeah, there are quite a few, especially noir/conspiracy, which go together and were very popular. Are you looking for recommendations?

Noir and psychological thriller/horror:
Pillow of Death (1945)
Inner Sanctum (1948)
The Amazing Mr. X (1948)
The Strange Door (1951)

psychological thriller and horror:
The Cabinet of Dr. Caligari (1920)
The Penalty (1920)
The Hands of Orlac (1924)
The Man Who Laughs (1928)
M (1931)
The Cat and the Canary (1939)
Dementia (1955)
The Bad Seed (1956)
Psycho (1960)
Premature Burial (1962)
Strait-Jacket (1964)
I Saw What You Did (1965)
Repulsion (1965)
Cremator (1969)
Alien (1979)

psychological thriller/horror and conspiracy:
Rope (1948)
Strangers on a Train (1951)
Dial M for Murder (1954)
The Night of the Hunter (1955)
The Manchurian Candidate (1962)
The Stepford Wives (1975)
Invasion of the Body Snatchers ( & 1978)

noir and conspiracy:
The Maltese Falcon (1941)
The Big Sleep (1946)
Notorious (1946)
The Third Man (1949)
The Ladykillers (1955)
Touch of Evil (1958)
Charade (1963)
The French Connection (1971)
The Seven-Ups (1973)
Chinatown (1974)

Gaslight. Woman driven insane from her house.

I’m a big fan of Twilight Zone re-runs, love them!

Shelley Winters did a few. I love that old broad. What a life!

What’s The Matter With Helen is fun.

I like Whoever Slew Auntie Roo?

It’s not black & white but I enjoyed Alfred Hitchcock’s Rear Window with Jimmy Stewart & Grace Kelly.