Carbonara is probably a go-to if you’re trying to impress. A real tasty classic that’s also deceptively easy.
A ragu bolognese is also really great — either beef or if you’re wanting to mix it up with some Italian sausage (or pork mince with fennel and sage). If you have more time you can turn that into a lasagne.
I usually find pasta is one of those things that I’ll just chuck what I have on hand in. If I have some cream then that with some shallots, white wine, tarragon and a squeeze of lemon. If I have veggies that need using then chop them up and do a tomato base — onion, corgette, pepper… all so good!