As far as rhyming goes, I think you want to avoid another three syllable name ending in the EE sound. I wouldn’t reject all names ending in the EE sound. They tend to be the kind of nickname / friendly sort of names your husband likes. Here are my suggestions….
Amelie and…
Cornelia (a formal name for Nell)
Margot (I think the O ending gives it a casual / fun feel).
Cecilia (You could use the nickname Cece. Because two syllables, sounds good with Amelie).
Elise (You could use nickname Lise or Lisi)
Lydia (You could use nickname Lydie /Liddy).
Rosaline (You could use nickname Rose / Rosie. Avoids Rosalie with 3 syllables and Ee sound.)
Lucie (French spelling of Lucy. You could use Lucille or maybe even Louisa or Lucie as formal)
Genevieve ( Nicknamed Gigi or Evie)
Caroline (Nicknamed Carrie).
Phoebe (Such a fun cute informal sounding name).
Sophie / Sophia.
Claire
Eloise (Such a fun cute name, or nicknamed Loie).
Colette / Corinne ( Nicknamed Coco).
Sybil (Nicknamed Sybie / Sibbie)