My favorite for years has been a very old Canna. I'ts probably the ancestor of the present Cleopatra. It has long purple stripes on the leaves, the flowers are about 2 fist size and can be all yellow with tiny red dots. Or all red, or all yellow with one petal red, or all red with one petal yellow, or half and half or some other combination. I am eager each morning in summer to get out and see what has bloomed this time.
I'll try to take some pictures when they start blooming, I just cut them down and repotted most of them. You're supposed to cut the leaves down after they've bloomed, but I like the stripes on them so let them go a long time till they have to be thinned out.