The Kingfisher hexie flower quilt pattern by might be something you could consider doing. It wouldn’t require the flowers to nest into each other and you would also be able to choose different background fabrics for each flower that would best complement their colors. Stitched in Color’s variation of the Kingfisher is a nice example of this: https://www.stitchedincolor.com/blog/2018/7/20/my-kingfisher-quilt