The most haunting music you ever heard?

Pet Cemetery was haunting. No soundtrack required.

"Flaming," Syd Barrett and The Pink Floyd
"Who are you this time?" Tom Waits
"Hall of the Mountain King," Edvard Grieg
"Misguided Angel," Cowboy Junkies
"Revolution #9," Beatles
"Cry Baby Cry," Beatles
"The Glass Spider," David Bowie
"Ghosts," Strawbs
"Cousin Kevin," The Who
"La Notte," Vivaldi

Warren Zevon - My Shit's Fucked Up
Jenny Hoyston and William Whitmore- Hallways of Always. The whole album seems to work to a more and more haunting finish.

"strange fruit" - cassandra wilson

Harold Budd's "The White Arcades".