Cherokee Purple. Black Krim Black from Tula. Brandywine heck, Almost any black tomato is a richer flavor than traditional hybrids.
Heirloom tomatoes are also fantastic for flavors, but they are difficult to grow. Consistent watering, pruning lower leaves to keep disease away, proactive treatment of fungus and bacteria. It's a lot of work, but the results you get when it all comes together, yeah, it makes a fantastic tomato soup, sauce, Caprese salad.
I'm starting seedlings this week. I'm probably going to have more tomato seedlings than I know what to do with. Of course, as problems go, I could have worse ones. The problem I'd like to have is growing too many mini watermelons. For some reason, I just can't get any yield, and the squirrels/mice gnaw on them as soon as they are vaguely ripe.
My partner is not going to be happy when I rip up most of the lawn in the backyard. She'll probably buy me overalls and a straw hat.