Pros: Napoleon gets points for being the only possible leader who could serve as a tactician and as comic relief. If a tiny yelling Frenchman in a feathery hat doesn't lighten the zombie apocalypse mood, nothing will. Plus his Oddjob stature may come in handy against zombies expecting delicious brains at zombie-arm height.
Cons: French generals don't have a sterling record against Nazis or zombies. Combining the two doesn't exactly bode well for your team.
Pros: If Fallout taught us anything, it's that Lincoln had a badass shotgun. If recent publishing trends have taught us anything else, it's that Lincoln was also a vampire hunter. If my history classes have taught me anything, it has yet to be applied in this article.
I also heard Lincoln had a cool hat which, as everyone knows, intimidates zombies to no end.
Cons: He's dangerously bullet-prone, and his tall and lanky figure probably looks delicious to zombies. And in a worst-case scenario, try explaining how you shot Zombie Lincoln: the most honest of all zombies.