Seperates

I am going tonight to look for bridesmaid dresses with my girls.
I have girls that are all totally different sizes, so I thought seperates might be a good idea to flatter everyone. Like they can do the same bottom and different tops.
I usually dont like seperates, but does anyone have pictures of them that are nice? Or know a designer that makes nice ones? Or even a style?
Anything will help!
Thanks!