•Why it earns a slot
Why it earns a slot: Heathcliff asks explicitly to be haunted, seems to get his wish by the neighbors' account, and Brontë still lets Lockwood close the book insisting the graves are quiet.
Heathcliff and Catherine's love curdles into a revenge campaign that outlasts her death by a generation, and the neighbors still will not walk past his grave after dark.
This distillation is written from the freely available original, which is always the better read when you have the time: Project Gutenberg.