Who's the oldest one of all?

[Roger Smith]

Adam is aroundabouts 14 or so, physically speaking. If Weird Time Shit is thrown into the mix he's closer to about twelve times that age. Moderately impressive but nothing in the great scheme of things.

Colonel is an indeterminable number of decades and some change old, but probably about as old as he seems to be, around 30s or 40s. Of course he's been that exact 'age' since he was created so that's weird.