Dinner choice with any 4 people, past or present?

Have been considering this one for a while. You sometimes hear it on the radio, or see it in magazines, where someone is asked to name the 4 people they would most like to share a dinner with, and they can select anyone from any time in history, past or present. At the moment the list looks something like this:

Spike Milligan
David Byrne
Branford Marsalis
Gilles Villeneuve

But it is in a constant state of flux and may be completely different tomorrow! I find myself considering the most ridiculous things, like will they all get on together? Will someone take over the show? Should I select people simply because I want to meet them, or because I genuinely think they would be good company?