What do you want? Color, size, bloom time.

There are late blooming daffodils, and early blooming daylilies, so theoretically, you can have continually blooming without adding any other types of plants.

It's been my observation and experience that Mertensia virginica/Virginia bluebells, Brunnera/Siberian bugloss, Polemonium/Jacob's ladder, perennial geranium, Aquilegia/columbine & Dianthus/carnation bloom between daffs and daylilies. In part shade, these have performed well where I am one zone warmer. There are likely others but these are plants I'm growing for the bees, butterflies & hummingbirds.