Some of my favorites:
Sergio Martino’s The Strange Vice of Mrs Wardh, The Case of The Scorpion’s Tail, Torso.
Lucio Fulci: A Lizard In A Woman’s Skin, Seven Notes in Black (had to put these in because they are masterpieces of giallo cinema to me)
Massimo Dallamano’s What Have You Done To Solange? and What Have You Done To Your Daughters?
Dario Argento: The Bird with the Crystal Plumage, The Cat O Nine Tails, Four Flies on Grey Velvet, Deep Red
Luciano Ercoli’s Death Walks On High Heels, Death Walks At Midnight
Emilio Miraglia: The Night Evenlyn Came Out of her grave, The Red Queen Kills 7 Times