I must say I like
Emma best. I know that names do not decide what people are like really, but
Isabelle sounds more like a beautiful person, while
Emma sounds like a kind person. And in the end only kindness matters, I think.
And what is now so wrong about Tigerlily? In
Peter Pan Tigerlily is a both beautiful and attractive woman, who Pter Pan valiantly saves!
About those middle names. If you must then you must, but then you should stick to one middle name only I think.