hopefully this post is not too late to be helpful...

I placed dwarf papyrus in the center of a bed and surrounded it with fiber optic grass. Both have narrow green grasses that look 'expolosive'...except the papyrus is on 24-30' stems and the fiber optic is lowgrowing and fountains in clumps...
Looks very cool. Sorry no pics though.

I had my fiber optic grass with purple plecanthemus and white osteospermum and a trifetti pepper. The planter looked great, but eventually covered this low growing grass so I will put it somewhere else next year.
Catrina