Minor update... having now seen Lincoln, I amend all previous suggestions to state simply that Daniel Day-Lewis should play everybody.
... I'd suggest he also play each one of us logging into the message boards and making suggestions on whom he should play, but that could open a can of worms and get trippy awful fast... I'm not sure there's an end to that ride.
So, let's just leave it with every role, every person: Daniel Day-Lewis.
I'm unsure what to put for a photo here... I mean, he'll probably look like every one of us when the time comes. Christ, this is him as Lincoln... he looks more like Lincoln than Lincoln does: