The apple tree is the most reliable fruiting tree in Central Oregon, followed by hardy Asian pear, European pear, plum, and sour cherry. You can also try peach, apricot, sweet cherry, hardy kiwi, and some kinds of nuts, but these trees may not bear consistently. Semi dwarf and dwarf apple tree varieties produce fruit in 2 to 3 years. Semi dwarf varieties usually are 12 to 15 feet tall. Cross-pollination is recommended for all apple varieties to produce fruit. Crabapples planted within a quarter mile of your apple tree may serve as a pollinizer if bloom times align.

Here is a great publication:

https://catalog.extension.oregonstate.edu/sites/catalog/files/project/pdf/ec1622.pdf