Hmm. Well, there\'s the basic predator/prey things. Need to include something like wolves, maybe bears, a bird of prey of some sort (Maybe 2 or 3 kinds), possible a scavenger-type predator (like a racoon or something), maybe badgers or wolverines. Prey would need a few small animals to feed smal/medium predators, and a few larger types (deer, moose, bison, etc) to feed people/larger animals.
So, suggestions:
Wolf
Bear
Badger
Rabbit
Squirrel? Gopher?
Deer
Moose / Elk / Bison / Buffalo