I grow the following in zone 5, Kansas:
BELLE COOK short, doesn't multiply (although not in a good location)
DESTINED TO SEE wonderful daylily! Vigorous, beautiful flowers and pod fertile.
GEORGE JETS ON Does well here. Cute flower although color is a little muddy
GREY WITCH Vigorous plant with lots of scapes and bloom.
HOLLY DANCER Great intense red spider.
JULIE NEWMAR Gorgeous flower. Slow to multiply in my yard, but love it!
MYNELLE'S STARFISH Love the flower but quite short
NORTH WIND DANCER Absolutely wonderful daylily in my garden. Lots of bloom, gorgeous cascade UF late in the season. Got my official vote and it gets my unofficial vote too!
PALACE GARDEN BEAUTY Does OK here. Pretty flower.
PERSIAN RUBY Very nice daylily, but I have others similar to it that I like better, particularly SPRINGFIELD CLAN.
TAOS Beautiful bloom but gets leaf streak badly here
TAR AND FEATHER Showy flower.
THIN MAN New here last summer. Too soon to judge
VATICAN CITY Gorgeous purple! Could use a little more sun to perform better here.
VICTORIAN LACE Another beautiful flower that might multiply better if it had more sun.
WILSON SPIDER A favorite in my garden!