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.
In my country we have song that came from a advent calender, called “jul på Vesterbro” and its my all time favorite (link to YouTube). Note that it’s the same actor that plays every role