I can't much stomach the violence in Mafia, sci-fi thriller, or drug war movies but I am crazy for women-gone-loony black-and-white sixties flicks: Whatever Happened to Baby Jane, Hush, Hush, Sweet Charlotte, The Nanny. ..
If you have any bent in this direction yourself, you have got to check out this insanely over-the-top William Castle double feature (available on netflix).
Here's Joan Crawford in STRAIT-JACKET (1964), fresh out of the asylum for the axe murders she committed twenty years before.
Another1961 creepfest starring Joan Marshall/Jean Arless: HOMICIDAL.
At the climactic moment, Castle breaks the fourth wall and introduces a "Fright Break!"