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If you don't need to be clobbered by dramatic plants (and I do sometimes) consider this one from Tibet: a pretty, delicate shrub with a flush of small lilac-pink flowers that have a delectable fragrance, blooming in April and sporadically thereafter. Almost translucent red-orange fruits follow. Since the flowers bloom on second-year growth it's difficult to prune. I would resist and accept its twiggy, arching, and sometimes tangled growth in favor of the flowers. Place it in a naturalistic garden so that it feels like it belongs and you'll be delighted with it. Or go in the opposite direction and try it as a bonsai. 7 x 7 feet, and deciduous.
Minimum temperature: -20° F