Crocosmia also commonly called Montbretia is a very popular perennial. Lucifer is the most popular for it strong red bloom and tall wide sword like foliage. Great to add to the garden for it's tropical look.
Emily McKenzie has the same wide foliage with a dark orange flower and zonal markings.
The species Crocosmia here is paired with Percicaria amplexicaulis 'Firetail' which blooms early spring throughout summer, one of the longer blooming perennials. It is 36-48" tall and good in zones 5-9, likes sun to partial shade. Great as a pressed flower too.
Crocosmias like sun to partial shade here in the Pacific Northwest. 2 1/2' h x 2' w, blooms Aug-Sept. Good in zones 6-9, some varieties are hardy to zone 5. There are many other varieties ranging from yellow through orange, red, and coral.
Another favorite large yellow flower with the same large foliage I like is Walberton Yellow and blooms a little later than the others in my garden.