Olallie Daylily Gardens in Vermont has a special focus on late and very late daylilies but most of them aren't registered. I have several. If you look at my plant list under unregistered you'll see the ones I have. All are dips though. Melanie Mason bred and sold some late blooming tets. Unfortunately, she went out of business last year. I have her Never Too Late. Some other later blooming tets I bought from her are Guava Jelly, Sanibel Coral & Bridgeton Eyecatcher.
I also have mixed daylily beds but I wouldn't worry too much about the colors. I think most daylily colors would work with many of autumn plants. I think the hardest color might be purple but reds, pinks, yellow, orange and brown would all be fine.
I love your red seedling! I have a late blooming NOID dip that looks very similar. And I would definitely buy Peach Party. It's gorgeous and it reblooms!
