There are some nicely done grapefruity/florals by Ellena including Eau de Pamplemouse Rose Rose Ikebana, and In Love Again. And his Jardin series fragrances are also popular.
Not sure about niche...I think Dior must have some nice ones.
Edit: Oh wait...Annick Goutal does these well... Where is Mimi Gardenia these days?
Great question, BTW.