If you're looking for an accessible easy listening compilation of short Christmas tunes, listen to Lawrence Welk's "Silent Night" album. After I listened to it two nights ago, I thought, "It seems like the LP was over before it even started."
That's because the longest carol on the album is "It Came Upon The Midnight Clear." It clocks in at only two minutes and 21 seconds.
If the essence of a Christmas carol is enough for you, "Silent Night" is your album.