You could also do an advanced search on the AHS site. I just did one for bloom size between 10-15" and scape height 30-60" and got 409 daylilies! Unfortunately, I didn't see an option to choose a color. And of course, there are probably a lot of those that can't be found to purchase, but it really opens up your search options and many have pictures.
Looked at pictures of the hydrangea "Vanilla Strawberry" and WOW! That's a beauty of a shrub! You live in a great zone for daylilies
Just throwing this one out there. Ruby Spider probably won't go with the colors in your hydrangea, but it does have a large bloom.
I just purchased Give Me Eight (a white poly) so I don't know how it performs, but it is an 8" bloom on a 48" scape. There are several good pictures in the database. Mine hasn't had a good bloom since I just got it.
Daylily (Hemerocallis 'Give Me Eight')