Ooh Rachel Sienna is quite lovely actually
You don't hear of many young Rachel's these days but it's a good strong name and sounds very pretty.
On a similar vein of names that are nice classics but not so in vogue currently (poss a bit 80s) and won't be 10 a penny at school - Laura, Natalie, Leah, Faye, Rebecca, Natasha
I do also like Emily fwiw.