I wrote one where both Lois and Clark die, that was a lot of fun.
Actually, checking out Tank's name on the Archive is a good idea as he's probably written a Christmas story to cater for every mood.
Another oldie, which I enjoy re-visiting now and then, is Jennifer Baker's I'm Dreaming Of A White Christmas. Which is just a lovely, WAFFy Christmas in Smallville story.
White Christmas LabRat