Docs, dentists, nurses, even vets will all be useful in a post-applesauce situation. Babies will continue to be born, accidents with sharp pointy things, you get the idea.

People who have zero skills to barter - any theoretical scientist. Most social scientists, pshychologists, those with PHDs in fine arts.

People I want to have around - Mechanical engineers, any engineer, welders, carpenters, plumbers, electricians, those with infantry training/military skills in general - paintballers need not apply - farmers, animal breeders/trainers. People who can make stuff with their hands and hand tools.

I'm taking Blast's advice and opening Bartertown.