Should have known RJD would come to Rob's musical aid. I was about to steer him over that way, myself.
It's difficult to choose among so many songs that touch my merry heart.
The ones that still move me - make me stop and listen (even if I'm having a great conversation with someone) are:
David Bowie & Bing Crosby - Little Drummer Boy/Peace on Earth
Bing Crosby ~ Adeste, Fideles (Enya does a nice job of it too)
Nat King Cole ~ The Christmas Song
Gene Autry ~ Santa Claus is Coming to Town
Burl Ives ~ O Holy Night (or Holly Jolly Christmas)
There are more I could add, but I don't want to "hog the jolly airwaves". HaHa.