Just like Skyhorse and A.P.F a swiss army knife though not the same one, though it's for 2 stupid reasons. 1) Splinters are annoying I want the tweezers 2) I find the toothpicks to be very handy, you don't want to meet the one other sole survivor who is a beautiful girl and have a chunk of food hanging out of your teeth now would you? You said movie scenario so this is part of the deal.
As for which knife, not sure off hand. I just know I used and abused my swiss army knife I had as a kid and it stood up to it and I am not sure any other knife I have ever owned could do that. And it has never let me down once, I've seen leathermans break enough to not want to rely on them if my life depended on it and I have yet to see a swiss army knife break minus me breaking the plastic side on one I've been carrying for probably 5+years now with my keys.
From that little knife I can probably make whatever other tools I need, if not I am screwed and would be even if I had a bigger/better knife.