I would want Margot Tenenbaum as a traveling companion through the wastelands. There would be nothing like traveling with a gloomy New York socialite playwright who, though resentful, would have no other option other than to follow my lead.
Doc Savage
Angelina Jolie is the one who French-kissed her brother and dated a model.
Lindsey Lohan did have a fairly long term relationship with a woman, but they’ve broken up. I believe she self-identifies as bisexual - she made a faux personals ad awhile ago that implied she would consider dating men or women.
On the one hand that’s Gwyneth Paltrow, whom I love as deeply as my black little heart will allow.
On the other hand, that’s not a really good use of your rations.
MacGyver would be perfect, but I’d also suggest Stu Redman from Stephen King’s The Stand. Whatever situation comes Stu’s way, he deals with; using whatever resources are available. With plenty of common sense, and fully aware of his limitations, Stu would survive somehow.
MacGyver, natch.
Eh, she doesn’t eat much.
Roland from The Dark Tower.
What about Scooby Doo? There’s going to be a lot of angry ghosts. . .
Freddie can build stuff. Velma’s analytical intelligence will be useful, plus she’s cute and will keep a man warm on a cold nuclear winter night. Daphne and Shaggy can be used as bait in a trap for the roving bands of cannibals. And Scooby, of course, can be killed and eaten.
Since Harry Dresden is out. . .
Zap Rowsdower.
Oh, OK, Michael Weston. I figure he’ll have all kinds of interesting voiceovers. . .
“When traveling through a post-apocalyptic wasteland, it’s important to not get dehydrated. If you hang a plastic tarp at night and leave a corner hanging down, the dew will drip down into your canteen, and the water collected from the air will be free of parasites.”
and he could probably improvise/repair weapons.
Strong candidate.
But, I’d go with a left-field choice.
Lex Luthor.
He’d have a functional society going inside of 2 weeks.
Apropos of the reponse (2) above me…
Is Bear Grylls fictional enough to count? 
Absolutely not. Being part of Roland’s ka-tet is a death sentence. Not only do you have a really good chance (i.e. nearly 100%) to die, you have the chance to die multiple times!
I’m also taking back my vote for Sarah Connor. That crazy bitch isn’t going to drag my pasty white ass around, despite sharing the same last name. Everyone but her direct offspring is cannon fodder as far as she’s concerned.
I’m throwing my lot in with:
Tarzan: Man is that a good choice. Strip him of any of the comic book superpowers like eternal youth and talking to animals, and he’s still a solid guy to hang out with. I’m assuming he can adapt to just about any environment and thrive. Any hostile dangerous environment would be adapted to to make it seem like a perfectly normal, comfortable place with all the comforts of home.
MacGuyver: Totally sweet. He’d find a good location close to lots of abandoned tech, eradicate the local Reavers with some subsonic noise annoyance (but non-violent) machine, and slowly transform the area into a technological paradise.
**Wall*E: **He didn’t survive an apocalypse - he was just left behind on a planet-sized dump. The cute little guy just keeps going and going, and would go so unbelievably out of his way to make a human comfortable it makes my two dogs look like blood thirsty velociraptors who’d eat the fleshy bits off my face the moment I fell asleep. He may not have the speed of MacGuyver, but he beats the shit out of his endurance and desire to work for me. Downside: knowledge of chemistry and explosions.
I heard he was dead.
I want The Professor from ‘Gilligan’s Island’. Easy on the eyes and can build almost anything from coconuts and palm trees…head to a tropical climate and we’re set to rebuild!
I suppose there are three kinds of answers:
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Someone to help you fight off those who seek to prey upon you. I suspect that he may count as super-powered, but I’d go with Brock Samson – frighteningly competent, can fight off hordes of well-armed opponents bare-handed, and (if brusque) not really a bad guy. If that’s unacceptable, then maybe … movie Rambo, or perhaps John McClane.
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Someone to help you survive/rebuild. MacGyver and the Professor are both good choices.
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Someone with whom to – um – begin anew, if you catch my drift. I’m not much into kids, but if the responsibility falls to me, then I suppose a circa-1990 Helen Hunt would be acceptable.
I haven’t read the novel, but I might take the father from Disney movie Swiss Family Robinson. Lot’s of knowledge of nature and handy in building improvised shelters and traps.
Oohh, Oohh! I pick Fairuza Balk! Of course, Michael Weston is now out as part of my traveling group, as I’d literally have to be the Last Man on Earth.
I think Strider would be a good pick.
If I was hoping to rebuild society to though, I would want to be with a typical Heinlein type hero.