While weeding the pumpkins yesterday, I found a volunteer tomato plant! There haven't been tomatoes in that area for almost 3 years! If I remember correctly, the last variety that was in that area was either Brandywine Pink, Big Rainbow, or Black Krim.
Cherokee purple is my reliable producer but I have more space than I can use so I put in several different heirlooms every year along with a few hybrids. This way I'm relatively certain to get a harvest.