Dandelion greens are well timed for a liver tonic during a changing season, spring and fall (they go dormant in summer). For us in the frozen North, cardoon is something I am fond of, but it does not store under leaves as well as it stores under straw, and straw is expensive (and you need a lot of). Cabbage does not rot under leaves but cardoon does. Huge crops.
Daikon is another one, if you are into huge crops. And various types of chicory are under appreciated. All three really benefit the soil and the next crop.