I sometimes do Phantom of the Grand Ole Opry. Starts with Carroll County Accident, morphs into Endless Sleep and ends with Long Black Veil. And there are some sad scary songs in it too. Sheet music actually is part of the act and appears on the back of Hank Williams' ghost, who's part is played by a drunk member of the audience who would ordinarily sing along at the top of his voice, about two words behind me.
If an encore is needed, I'll do "You Can Pick Your Nose, You Can Pick Your Friends, But You Can't Pick Your Friend's Nose". That's a hair-raiser and never fails to have the audience reaching for Kleenex.