From her suggestions, I think
Morgana is gorgeous. It is recognizable and not too out there.
I would also consider:
Bianca: lovely, timeless.
Adele: vintage-chic, I don't think the singer is too much of an association (the pronunciation is different).
Rachele: I've always loved it, but maybe the sound is a bit harsh.
Gioia: nice.
Celeste: Vintage-chic, I love it.
Ines: same as above.
Margherita: timeless, sweet but with a little bit of spunk.
Elettra: I like it, but I am afraid of the
Electra complex association.
Marzia: I'm not sure if it is grandmother material or if it has a possibility to become popular again.
Alba: same as above.