Some slightly highbrow ones which are beautifully written - has anyone mentioned Vikram Seth "An Equal Music"? Passion between two musicians. And that one which was was turned into a slushy movie by Minghella with Binoche - The English Patient? Or the Passion by Jeanette Winterson - a bit of escapism in Venice (although in my dim memory most of the passion was between women rather than a handsome man).
Wharton is a bit grim in my view for romance.
I also loved the Time Travellers Wife but it has had mixed reviews here on Mumsnet.