New Year's Day buffet for quite a fussy lot

[DoubleMum]

I've escaped catering the big days, but it's my turn on NYD. So just because I know I'll get loads of great ideas, what can I serve for this lot:
DH & I, + 2 children 10 & 7, not too fussy
DH's parents - no peppers, no Indian/Chinese/otherwise ethnic/no spicy food
DH's grandparents (in their 90's)- no spicy, nothing too non-British, no pizza, no pasta with sloppy sauce (pasta bake might be OK), no seafood, no mushrooms, no pineapple
BIL - not fussy as long as there's lots of alcohol
2 nephews 18 & 21,not fussy but could eat enough food to fill the house

Needs to be a buffet as I can't seat everyone, but a hot buffet as the grandparents wouldn't really like cold food unless sandwiches.
Thankyou!

Potato skins
Warm baked bread (the par baked stuff) with cold meats
Sausages wraped in bacon (using nice posh sausages)
Mini yorkshire puds with a little bit of roast beef and horse radish inside)
Pate on warm toast
Home made sausage rolls
Cheese and pineapple (we have to have this at every buffet as its the law)
Spring rolls (vegatable ones are quite simple and not spicy)

I'd be tempted to do a big Shepherds Pie for the olds meeting the no mushrooms, no peppers etc brief. Can be made in advance, cooks easily, can be eaten with one hand etc etc. And if not frozen before, leftovers can be frozen happily.

Then I'd probably do some more interesting things, based mostly around what I fancied eating or making.

How much do you want to cook vs buy in? Are you doing prep on same day or beforehand?

I will cook most of it myself though would buy in bread etc. I would like to prep as much as possible before as I know from previous experience that I will need the house to be spotless and very Christmassified that day.
My children, and the grandparents, would definitely appreciate shepherd's pie, as long as I cook roughly a whole sheep's worth for the starving nephews!
Marne I love cheese and pineapple! Just one of those things that really go together on a stick IMO.

How about a jacket potato bar? Lots of jackets, cheese, beans, chilli, tuna, coronation chicken, ham, salad, coleslaw etc.

It sounds nice, but my MIL runs a sandwich shop so I think she might feel like she was at work LOL! Although it's the grandmother who is difficult really, she has so many ideas of the 'right' way of doing things. Sigh. She's lovely though.

We always have a steak pie on New Years Day. As far as I know this is traditional in Scotland (am not from Scotland, but have Scottish roots so we always first foot and do the steak pie and things!!)

That should satisfy the non spicy fooder and the older non exotic eaters!!

Yes could do a pie, although might be difficult to eat with just a fork do you think?

You all seem hard to please.

Yes I'm sorry, don't mean to be negative.

I'd either go jackets with various fillings all laid out, sarnies or tell everyone to piss off.
Seriously, I can't be arsed with pandering to fussy people. When we have guests I try to make something that most people will like, chillis, jackets, curry, hot dogs with meaty and veggie sausages, interesting salads etc, but it's not an effing restaurant.
In fact, if anyone turned their nose up, i'd be finding them the number of the nearest chippie.

Ironically, the 90 yr olds would probably like fish and chips!