Panicum virgatum I have several grasses around the yard, especially the native Panicum types. I love the architectural element they add to the garden.
Buddleia 'Nanho Blue' with butterfly (some type of Skipper, I haven't started identifying the local species yet but I'm starting to get lots of Skippers in the yard)
Coreopsis 'Heaven's Gate' - a fabulous color and a good butterfly attractor. A bit floppy, though. I have this one planted where it can lean against my 'October Skies' Aster
This Hydrangea came with the house. There are two bushes, right up against the foundation and combined they have produced 3 blooms. The color is nice but I'm not sure it's worth the effort to move them. I prefer H. paniculata or the lacecap varieties to this, probably 'Endless summer'
Echinacea 'Twilight' - I've had poor results with Echinacea in the past but new garden, new zone, it's worthy trying again.
Crocosimia, a bulb I bought at an end of season sale. Fabulous, prolific bloomer, definitely a keeper! Since I've been growing it in a pot I have to see if I can put it in the garden for the winter or if it needs to go in the basement.
My first Aster of the fall - Aster (Sympotrichium) oblongifolia 'October Skies'
What's blooming in your garden?
Addendum: The mountain mint I have is Pycnanthumum muticum, there are several species of mountain mint with at least one species native to most areas of the Eastern US (and I think there is a California native, too). This plant can be aggressive in the garden but isn't too hard to control. I've got it planted in the strip between the sidewalk and the street where it can spread if it wants to.