Never done Christmas with just the 4 of us so will probably massively over cater if I do the usual meal
Sometimes there's just two of us and I usually cook enough food for 6-8.
However, we really like roast dinners and that means little or no cooking for about 3 days afterwards and I have a step by step plan so I can do it in about 3 hours with lots of breaks and little stress.
We have a single large turkey breast and the normal sides, but not endless varieties, probably just roast potatoes, stuffing, pigs in blankets, sprouts, parsnips and carrots.
We will have a full dinner from the leftovers at least once, plus things like leftover roast potatoes fried up with pigs and blankets, turkey sandwiches, veg in a macaroni cheese, that sort of thing. There is usually some turkey that is frozen in slices.
But OP, if you like turkey have one, if you don't, don't. Or you could have it on Christmas Eve and then have Christmas Day off cooking. I think we might do that this year actually.