Personally I would look for something that you can do most of the work befor hand, even the night befor!
So
Soup
stilton and brocolie (festive)
Leak and Potatoe
Finger foods
You can buy pastry cases and fill them with several different fillings (make fillins in advance) and have them as an apperitif
Tartlets can be made in advance and cook on the day of
Metzo
So babaganoush (store bought if you want) humus (store bought) olives, served with toasted pita breads
Roasted / baked cheese with things to dunk (communial food which is fun with family)
Prawn cocktail (big plus you can do all in advnace and assemble)
Pata only served with a roasted sweet onion relish, warm toast or posh oven breads
You could to a terrine (make in advance) I do a duck, cranberry, pork and pasterio one
Chippolates wrapped in Sage and cured ham (might not work if you are doing pigs in blankets
Tarlets are in my opinion one of the best to do you can do a load of the work in advance, make different options so lots of choice therefore everyone can be happy, and you can enjoy them with your guests wilst being a culiriney godess.
I also love terrines for these occasions
But a good prawn cocktial or melted cheese is very hard to beat!
Have fun