Entirely white coloured villagers on white snow doesn't sound well to me. I think you should choose natural coloured villagers
If clutter doesn't bother you, you definitely should use presents on random spots of your town. Would look really nice especially on bridges and town plaza. Also using dud tickets in an appropriate place can make them look like wishlists. I use it near stone tablet, looks well
Ooohh yes I like that! When you knock down the balloons but don't pick up the presents they stay there c:
- - - Post Merge - - -
Also I'm not sure if you would have separate characters for santa and mrs. Claus if IRL they're supposed to be living together hehe if you make Santa have a Mrs. Claus mannequin or vise versa
Maybe for their house a big cabin room and exterior with jingles pic and stuffed stocking on a fireplace? And the festive white tree, yule log, tree stump chair, gift pile, and a turkey on the cabin table

Then another room with all jingle furniture, and snowman furniture, ice furniture, maybe sweets?? And another character as a toymaker elf I love that idea
Other winter furniture like snowman matryoshka, snow bunny, small igloo, sleigh, maybe eagle pole, scenic painting
I would check out some dream addresses after that!