I have some fragrant daylilies. I'll try to post them later. I wanted to try to note this year which ones had fragrance but with all the rain I was wearing so much insect repellent that I just couldn't smell anything but that!
Just wanted to add that some cultivars give off scent at different times of the day. Some of my daylilies are more fragrant in the morning and others have no scent at all until later in the day.
I haven't come across any daylilies that I thought smelled bad. I have come across some horrible smelling peonies though.