Purple asters big and small-ish

Last fall I planted a prairie sampler on the south side of the house. Amazingly, I have lost very few of those tiny starts (which are still in the "creep" phase). I also transplanted some established plants into that bed, to round it out and fill a few empty spaces.

The shorter New England asters are 'Purple Dome', but I have no idea what the big and tall one is. At one point, I thought the pollinators were favoring the big one over its little cousins, but today I observed the bees were searching out flowers with still-fresh yellow centers. Apparently, the blossoms on the tall one peaked earlier than on the short ones.

I'm contemplating rearranging all these asters into one big showy clump, the tall one in the back and center, surrounded by the shorter ones. I'm hoping my pink 'Wild Romance' aster crops up somewhere, as it would add a nice splash to such an arrangement. I'm not sure what happened to it, but I suspect wascally wabbits are involved.