I know the Mariah Carey song is hated because its overused, but its also objectively a well produced piece of pop music.
My favorite though is O Holy Night. Performed well I want to stop and listen to it. It moves me, and I dont give enough of a fuck about religion to call myself an athiest.
White Christmas, which was written by Irving Berlin, who was Jewish!
I like it because of how intricately the melody is written. It ebbs and flows perfectly against the chord progression and feels much closer to a jazz standard than most other Christmas songs.