Gwen Verdon and Chita Rivera both had beautiful voices when they started their careers, and even when their voices became a bit raspy they retained a gift for delivering a number that Sutton has not mastered yet.
I believe Bebe Neuwirth, Karen Ziemba, and Ann Reinking are the closest you get to Verdon, Rivera, McKechnie, Helen Gallagher, et al. On the Q & A on Broadway.com with Neuwirth, she mentions the fact that she can hardly imagine her life without dancing, her two Tony-award winning roles on Broadway have been the dance-heavy Nickie and Velma Kelly; when you compare her to Foster you realize that while Sutton Foster is a talented actress, singer, and dancer, she is hardly Broadway's most prominent triple-threat.
"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"