I cast my vote for Dead Nettle. You can eat it, but in my opinion it tastes like dirt. I'm sorry. I mean, it has an "earthy" flavor to it. A member of the mint family. It's all over my yard, but I don't do anything with it. I just like to watch them shoot up in the springtime. Shallow roots don't really compete with anything.
I brought this back from the farm where they grow the tiny ads:
try homesteading without the stress and anxieties of buying a homestead