Camille is my middle name, and if I ever have a daughter, it'll be her middle name. We pronounce it the French way, and for that reason alone it'll never be a fn option, I find it very pretty but I do think if I had to be called 'Ka-MILL' all the time here in the UK it would drag, and a lot of English-speakers find it hard to say, at least at first.
From your list, I like
Caroline - prettier the French way, but good old UK
Caroline is a staple and another mn option if I had more than one daughter,
Constance, again, like both UK and French pronunciations although the UK is far more dated,
Lucille,
Lucienne,
Madeleine,
Olive,
Rosalie,
Sylvie.
I also like
Emmanuel,
Hugo and
Vincent.
Others I like:
Athénaïs - So extra, but I think it sounds very pretty. I don't think it's useable outside of mn/GP though.
ClémenceClémentineCoralie - Although this feels a little dull to me now
DelphineEmmanuelle - This is growing on me as a MN.
Faustine Florence - French prn is prettier
GenevièveLaureLéonieLéontineLéopoldineLudivineLydieMagaliMarcellineMargaux - not a fan of the spelling
Margot.
MargueriteMélisande - really cool and so, so, so much nicer than
Millicent.
SabineVictoire /
VictorineVivienne - more elegant than
VivianZénaïdeZéphyrine