I think to keep the meeting interesting I would pick drivers that are not favourites, and have some kind of controversy or hardship surrounding them, so with that said I would pick:
Heidfeld, good driver always in bad cars or bad teams. Currently without a car.
Raikkonen, great driver and a former world champion and for some reason not in F1. Plus his experience with rally racing.
Nelson Piquet Jr., of course with the crashgate incident and then moving on to other circuits.