Holidays seem to want high alcohol and dark - not sure why. I guess it makes you feel warm, although served cold.
Try something simple. A couple of suggestions, I'm sure you can find recipes, or the community will help you craft one.
Belgian Dubbel. Maybe around 8 to 9%, with Special B, dark candi syrup, some orange peel, coriander, and paradise seeds, but make it subtle.
Robust Porter about 8%. You can do lots with this. Keep the roast/dark malts low (or not at all), with lots of chocolate malt and dark crystal. Licorice, vanilla, fruits (raspberry, cherries), cocoa, nibs, coffee, even peppers. Not suggesting using all these, just a select few.
Christmas Oatmeal Stout. Around 8%. Just a great Oatmeal Stout, and you are done, something like Rogue Shakespeare Stout. Or you could ruin it in keeping with the season and add some spices, fruit, coffee, or chocolate.
I usually try and brew a few high gravity great beers, that are not hoppy since I brew them all year. But this year I admit I have several variations of Porter to use up lots of fruit I collected over the year; Raspberry and Coffee, Raspberry and Chocolate, Cherry and Chocolate, Bourbon and Oak. Vanilla and Coffee - around 2.5 gallons of each.