I'm not a beet person, at least not yet, but I do cook turnip greens (and collard and mustard greens and used to like dandelion greens). Oh, and kale and chard. I miss watercress and sorrell, both easy to grow, or used to be back in Los Angeles.
But those last ones mentioned after turnip greens don't come with bulbs too, so never mind.
Fennel bulbs, I like, but just about never see in my market here. I think I've used the leaves back when I grew fennel, but can't remember at this point.
Have never grown parsnips, don't know about their leaves.
Have never tasted celeriac - I remember that Hamburgboy likes it, but again, I don't see it in my store.