What would be a good perennial to plant over crocuses?

I usually plant zinnias in that area....but I dont want to yank up the crocus bulbs after the zinnias have done their thing.

What would be a good perennial to plant over crocuses?
Coneflower, Coreopsis, Bee-balm, Phlox or Lilies would all work well. You could even do a combination of them for variety. None of them would be up when the crocus bloomed and then they would fill in beautifully. Coneflower and Phlox both bloom pretty much all summer with very little care.
Reply:How about some peonies or nasturtiums. Daffodils might look nice too but, they might overrun your crocuses since they are bulbs too. Marigolds are a real sturdy perennial and would look lovely amongst the crocuses. Better yet do all three. Peonies and nasturtiums first for the pink, white, and violet to blend with the dark red then the marigolds for the yellow and orange.