Scully,
Without a doubt it's "Sleigh Ride" for me. It doesn't even mention Christmas nor anything related to it but it is always and only played a ChristmasTime. It was written in 1948 by Leroy Anderson and I have his personal arrangement for the piano. I play it and will put it up for all to hear (including my ex-JW enemies and even dubs who are by nature my enemies, since it is not about "Christmas" per se) as soon as I can get my software and keyboard to speak to each other.
Farkel