Does the dead person return to life for the dinner? Haha. I would bring my Nana (great-grandmother) back so my grandmother and mother could see her again. I never really knew her but she lived in the UK while they live in the US and were unable to attend her funeral or be there in her last days. They were close and feel awful about it, so I'd want to give them a chance to say goodbye.
Kurt Cobain, former lead singer of one of, if not THE, greatest Rock band of all time, Nirvana. I would ask him all sorts of questions about how he came to be inspired to write all those unique songs and what they all meant. Also, I would like to ask him if and why he committed suicide because I know deep down it's not as clean cut as he was "overwhelmed by how popular he and his band had become". That's not a reasonable excuse. It's why you become a celebrity and/or legend in the first place, to gain popularity.
My friend who died September 19th, 2017. I would like to have just one more discussion. But you probably want to know what famous person, eh? I think Amy Schumer would be fun but she says she's introverted according to her book, "Girl with the lower back tattoo," so Suoreme Court Justice Ruth Ginsbergh (spell?).
I think maybe Nikola Tesla. Him, or Edgar Allan Poe. The first, because I feel that the things we know about him are only the tip of the iceberg in terms of his thoughts and ideas, and I truly feel he's one of the most brilliant people to have ever lived. The second, because I would love to pick his brain for more story ideas and poems that might have gone unwritten due to his death, and also know how his brain works. I kind of feel he possibly had a mind a bit like Stephen King's, except that unlike King, nobody ever got to interview him about it and truly learn where those scarier ideas came from.