I nominate "He Is Coming To Us Dead," from the New Lost City Rambler's 1973 album "Remembrance of Things to Come."
To an extremely bouncy melody, it relates the story of a father awaiting the arrival of his son home from the battle front -- in a casket.
Tracy Schwartz's liner notes posit: "The deceptively bright nature of the tune leads the creative folklorist to suspect that it once belonged to another set of words and completely different subject."