You can keep your burning bush pink and your orangey-red Autumn Blaze maple (the "it" tree for fall color around here these days); I'll take the dark, luxurious reds of fragrant sumac, Rhus aromatica, any time.
The glossy foliage catches the low autumn light and adds depth and complexity — plus a touch of glamour — to this Rocky Mountain native.
Hands down, the best shrub for full sun, poor soils, and dry conditions when your goal is super red fall foliage.