What's the USDA zone 2-4?
[Sorry, had it in my head you wanted Edibles!!!!]
Probably could get away with some fruit, like Apple, or Plum. So hardy stone fruits. Peach is included here, but harder to find a heirloom with high altitude and short growing season character. Pear maybe.... Nuts might work too, filbert, black walnut, etc. Slow growers though. I am a fan of something called monkey puzzle tree from Chile.
Berries too, like Blueberry or Huckleberry. They could be planted for edible landscapes....
Heck, you might even be able to find some Chinese bamboo, that thrives in the mountains...
Anything like pine, tamarack [larch], true cedar [not cypress], juniper etc.....
will all be hardy evergreens and the last couple will be shrubby........ pine and larch probably won't?
Evergreen hedges always look good
Mayabe some type of evergreen ground cover
Ligonberry? very tasty too.....but thrive in shade