The Kinks, "Father Christmas"
John Lennon, "Happy Xmas, War is Over"
The Jackson 5, "Santa Claus is Coming to Town"
(The only version of this song I actually enjoy, because it's funky enough that I can ignore the creepy/emotionally abusive lyrics, though there's no small amount of irony in the fact that it comes from one of the most exploited child stars of all time.)
Savatage/Trans-Siberian Orchestra, "Christmas Eve (Sarajevo 12-24)"
What are your favorite Christmas/wintertime holiday songs?