I've got 3:
"Muppet Christmas Carol," mostly because of the brilliant stroke of using Gonzo-as-Dickens as the narrator. Love Gonzo & Rizzo in that.
For a "straight" version, the George C. Scott one is my favorite.
And I love Albert Finney's "Scrooge." David Collings is the Cutest Bob Cratchit Ever (with Kermit the Frog 2nd), and "Thank You Very Much" is one of those sticks-in-your-head-forever songs, but my very most favorite part is during the big "Father Christmas" reprise at the end, where the boys are pulling Scrooge on the sled; they stop to watch the bellringers in the street, and the bell-ringing interlude builds up to the point where they're all jumping in unison, then in one stroke, everyone hits the march cadence into the street singing, "In the morning, Christmas morning..." and it's just one of those huge "Why I Love Big Musicals!" moments. ::sigh::
"In my own little corner..."