I so enjoy mixing and matching with others when it come to irises ! What goes with ? I'd say
Roses ? yes yes yes (even at a distance, like the second picture)
Delicates, like...Love in a mist
California poppies
Forget-me-nots
Dusty miller (or snow in summer, to some)
Or more stately, lupins
Growing greens of thalictrum and aquilegia
And winter savory blooms right in time to show off the stems coming up
Even a bit of bamboo is nice
