For me, the answers obvious: Justin Bieber. I would hate to find him in a zpoc and *shudder* have him follow me around. I have a feeling a lot of people would put the same...
Hands down. Donald Trump. If he was alive he is just a complete douche and would annoy you to no end. If he's a zombie then his hair would make his head impervius to trauma. Sort of screwed either way.