"Death Might be Your Santa Claus" by Rev. J.M. Gates was a sermon recorded in the 1920's.

"Merry Christmas from the Family" by Robert Earl Keen.

"Christmas in Prison" by John Prine the one that goes: It was christmas in prison and the food was real good, we had turkey and pistols carved out of wood.

"Fairytale of New York",mentioned above, has got to be the most uplifting downer of a christmas song I've ever heard.

Johnny Cash also did a kind of weepy xmas recitation called something like I Remember Christmas.

Good luck with this project and have a merry christmas... or not.vl