C'mon
Rankin-Bass Rudolph or the list is bogus.
Same with National Lampoon's Christmas Vacation.
Original Grinch is best Grinch, but I'll accept them as a duo.
Die Hard is as Christmas as it gets, so yipee kai ay motherfucker!
A Charlie Brown Christmas is a must.
Emmet Otter's Jug Band is almost at that level of necessity, though maybe only for us gen-x kids.
Anything else is open for negotiations on my end, I ain't mad at anyone else's list beyond joking.
However, Frosty the Snowman, also a Rankin-Bass production is awesome, and any of their Christmas specials deserve at least an honorable mention.