The reason I would compare Donna Murphy (primarily a musical theater actress) with someone like Blanchett, is because of Murphy's meticulous approach to each character she plays, her immense versatility, and of course the class that she immediately brings to any role (and subsequently any production) she is in.
Same could be said for Jones, Burton, and perhaps Laura Linney.
I think Sutton Foster is insanely talented but I don't think she can be compared to Blanchett in any way, except for the fact they are both female actors.
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"