Although I’ve not been impressed with either the hardiness or the crazy, almost diseased-looking appearance of the newer coneflower cultivars, one that I do like is Green Jewel. 
Green Jewel has settled in nicely at the edge of my front patio. It looks more like a green daisy than a kooky coneflower and perhaps that’s why I’ve taken to it.
I love the frilled edge of the petals and the way it can appear to change color, depending on the age of the bloom and the surrounding light. Here is the same bloom in early morning light. 
It appears golden and almost translucent. So lovely.
These plants are good mixers. I have them in a mostly white section of the garden, next to Casa Blanca lilies and a blue juniper. Although coneflowers generally prefer full sun, this spot is partially shaded and the plants do just fine.
If you’re looking for a mid-sized plant with green blooms, give Green Jewel a shot.
You’ll be glad you did.
Personally, I agree. I like the ones with the typical recurved petals, too. It was their characteristic trademark.
Yes, I agree. Some of the newer varieties are great colorwise, but the overblown pompoms look too much like asters yellow for my taste!