haunting/dark classical


new to classical, I really like Samuel Barber's Adagio for Strings, Op 11. I am looking for other music with the same dark/haunting sound. Suggestions?
lwatson
Ralph Vaughan Williams' "Fantasia on a Theme by Thomas Tallis"

Carl Nielsen Symphony No. 5

Jean Sibelius Sym. #4 - used in the movie "Alien"

Igor Stravinsky "Rite of Spring"

Hector Berlioz "Symphonie Fantastique"

I love the haunting/dark kind of classical music myself...
Mendelssohn "Overture "The Hebrides" (Fingal's Cave) Op.26

Rachmaninoff "Isle Of The Dead"