Hardrock, Coco and Joe
From Wikipedia: Hardrock, Coco and Joe is a short stop motion animated cartoon written by Stuart Hamblen. It's about three of Santa Claus' helpers who ride on Santa's sleigh each Christmas. The short has become an annual "Christmas Classic" on Chicago's WGN-TV since its introduction in the early 1950s.
Its full title is Hardrock, Coco and Joe - The Three Little Dwarfs. It was originally created by a company called Centaur Productions. Its running time is about 2 minutes and 45 seconds. This cartoon is traditionally broadcast with their two other short Christmas cartoons, "Suzy Snowflake" and "Frosty the Snowman".
According to the narrative song, Hardrock drives Santa's sleigh, and Coco navigates with maps. Santa "has no need for Joe/ but takes him 'cause he loves him so". Part of the charm of this primitively-made cartoon is that Joe, the smallest of the three and very boyish-looking has a deep bass voice.
Donner and Blitzen, away, away