I went through every year of Impreza, Legacy, Outback and Forrester on KBB and according to them, none of those cars had a non-turbo 2.0 liter. Is there?

Not in North America. The n/a EJs here are/were the 1.8, 2.2 and 2.5. In other countries there are EJ15s and 16s, too.

There was a N/A EJ20 in Japan and Australia, and I believe New Zealand too, but not North America.

Though there is a postal legacy running round here with a N/A 2.o i think.

there is one here in mt its from a jap importer