Glad I'm not alone on loving Rudolph's Shiny New Year.
I actually watched the Pee Wee's Christmas Special a few times in the past. It's cheesy in a charming way.
Besides Rudolph's Shiny New Year, another Rankin/Bass favorite of mine is Nestor the Long-Eared Christmas Donkey from 1977. Despite the tone being very melancholy, it's a very sweet special since it's Rankin/Bass' fourth adaptation of The Nativity but told from the perspective of talking animals. Unlike The Star, Nestor handles the topic very seriously and isn't comedic and is mainly focused on Nestor coming to terms with his long ears.
To this day, I can't think of another fictional or animated donkey that looked this adorable as Nestor. The closest is the cover for the Christmas Song "Dominick the Christmas Donkey".
Also is it just me, or am I the only person who used to confuse Nestor the Long-Eared Donkey with Dominick the Christmas Donkey until recently.