Sometimes Christmas means the blues.
Over The Rhine‘s 2006 album of original Christmas themed songs Snow Angels is smooth and softly jazz/blues infused, celebrating (if that’s the word) the fact that sometimes Christmas is not the happiest day of the year.
I got it for free from Noisetrade.
The Noisetrade notes suggest that folks who like Norah Jones, Emmylou Harris, The Civil Wars, Bon Iver, Billie Holiday may be interested.
Even thought it’s free, you can pre-listen at the Noisetrade page.