I buy a whole big turkey, then crown it, bone the legs/ thighs and stuff with a sausagemeat stuffing (different one each side) and roll in foil to bake alongside the crown. This means plenty of meat for everyone plus the rolled turkey makes great sandwiches.
i've got a standard single sized oven and a big turkey fills it. A big crown with the sausage stuffed rolls alongside leaves space for a big tray of potatoes. What I tend to do is get the turkey cooked just over an hour before serving, cover in foil (with the ends just open so it doesn't keep cooking) then big towels over to keep it warm. That way the oven is free so I can have a full shelf of stuffings and sausages, one tray of potatoes, and one tray of roasted root veg. I find in a full oven I need to allow a little more time for everything to cook and to get the roastys crispy i take everything else out wack up the heat for ten minutes then add the pre cooked yorkshires from frozen for another five minutes.
I do in advance and freeze: stuffing balls wrapped in bacon, pigs in blankets, frozen cook from frozen cheap party sausages (because actually thats the ones my DC like best), Yorkshire puddings, vegan nut roast, cranberry and orange sauce, bread sauce, onion sauce, gravy both meat and veg/ onion gravy.
Veg in advance chilled: brussels (sometimes my mum does them with chestnuts), carrots, par boiled potatoes, new potatoes, red onion/ rosemary/ carrots/ parsnips/ swede etc to roast.
Veg from the freezer: peas
For starter I either do a soup (vegetable so suitable for everyone) or a terrine. (It sometimes comes down to what plates I'll have available depending on numbers and desert options.)
For dessert, other than the traditional pudding, brandy butters, cream, icecreams etc i do a platter of berry fruit/ chocolates/ truffles then a cheeseboard platter (both easy to prep in advance) as I find people graze for pudding after the stuffing that is Christmas dinner.
I also do late morning canapés that we eat with champagne whilst opening presents, then have lunch starting at 2ish.
Its definitely worth working out your pans, rings and oven shelves in advance. A few decent big microwave vent lid cooking dishes (About £1 in poundland/ homebargains/ B&M type stores) can really help spread the load if you've got a microwave.
At the end of the day people are there for your company and to spend time together, ensure there are drinks aplenty (somewhere obvious so people help themselves - its one less job for you) so glasses can be refreshed regularly (be it alcoholic or not, dare I suggest fruit shoot type drinks make keeping the kids refreshed so much easier, saves washing up and spillage clearing up) and don't stress if some things aren't exactly as you wanted them to be. No one will know.