Murnau's silent "Nosferatu" (1922) tops my list. "Bride of Frankenstein" is the class act--and funny, too. Carpenter's "The Thing" arguably is a sci-fi, but it's really horrible, too.
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.