The way I see it, I'll need people to complement my skills and provide skills that I don't have. I'm a decent stealthy sort, and can sprint quickly, and I'm fairly resourceful, so when it comes to gathering supplies and tracking and staying hidden and safe, I have no worries. I'm not a bad shooter either, but lack my own gun (being British) and don't have a massive amount of experience, so I'll need people good with guns. I also have barely any knowledge of first aid, or any medical skills at all, so I'll need someone to help me there. We may be needed to help rebuild the human race, so ideally I should pick one other guy and two girls for that purpose. That would pretty much cover everything needed at this point. Oh, and I need someone who drives well, since chances are we'd probably have to build up a convoy at some point and possibly drive maniacally to avoid really bad hordes of zombies. I assume we'd be meeting up with other survivors eventually and building our ranks over time, right?
With all that in mind, and for those reasons (I won't list any further here), I would have in my group of three:
Lightning Farron (FF13)
Sherrif Sarah Breaker (Alan Wake)
Dr. Derek Stiles (Trauma Centre)
To be fair, regarding driving, I'm not sure how any of these hold up, since they don't drive in their respective games. However, Lightning does briefly commandeer motorbikes (or their hover equivalent), and Breaker actually pilots a helicopter pretty well in her game, so I guess that counts for something, right?
Yes, I used the English spelling for 'centre' there. I'm a language purist. Sue me.