Other suggestions, from French composers:
Claude Balbastre's 4 Suites de Noel, played by Olivier Baumont in organ and harpsichord. It is a very nice music, based on popular canticles.
Or, Poulenc's Motets "pour le temps de Noel" and his beautiful "Un soir de neige".
For those who are in a bad mood or are concerned by the several wars in the planet, I would suggest Debussy's "Noel des enfants qui n'ont plus de maison".