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.
I love any Xmas song covered by pentatonix (and there are a ton!), which is a cappella.
Here’s just one album of Xmas music, to get your rabbit hole going! They are so so amazing.
https://m.youtube.com/watch?v=EGplqTN58jk
But mostly Xmas shit turns into earworms for me in the middle of summer, so I close all the blinds and watch Xmas movies. Makes it almost possible to forget it’s a billion degrees out.