I like Lily. Don't love it and it does seem very overused but it's a pretty name and popular names are popular for a reason.
Similar vibes to Lily either in sound, meaning or style but less popular:
Amy, Aven, Alice, Bonnie, Bronte, Calla, Callie, Cecily, Dilys, Daphne, Everly, Elodie, Esme, Elsie, Fleur, Holly, Iris, Ida, Jonquil, Josie, Kitty, Lyra, Lyla, Lillian, Louisa, Martha, Maria, Millie, Molly, Mabel, Nellie, Nancy, Polly, Posy, Rosa, Rosie, Rowan, Sylvie, Sally, Suzannah, Stella, Tilly, Violet, Winnie
Middle name suggestions for Lily:
Lily Cassandra
Lily Evangeline
Lily Francesca
Lily Georgina
Lily Hermione
Lily Juliette
Lily Jemima
Lily Katherine
Lily Madeleine
Lily Miranda
Lily Natalia
Lily Octavia
Lily Persephone
Lily Rhiannon
Lily Sophia
Lily Victoria