My best garden plants would be ones that form a nice clump and have multiple blooms open at once, besides holding up to the elements. Would have to list these:
When Spirits Unite
Trahlyta
Primal Scream
Spacecoast Starburst
Lavender Reflections
Old King Cole
Gudrid
Ruffled Ballet
Prickled Petals
Strawberry Candy
Raspberry Candy
Serena Dark Horse
Suzy Cream Cheeze
Rosy Lights
I am going to quit right there because I probably could list another couple dozen that do very well here.