N.C.
I have a friend whose daughter's middle name is "Amara" (the husband is from Spain) - and I think it is pretty.
I think anything with open sounding vowels is nice for the middle name, as Raquel is a fairly strong first name.
I'd also recommend "Elise", "Elena" (as you said) or "Alana", "Eva", "Alicia", or "Serena"
It's fun to pick names!