All of Idina Menzel's understudies sang circles around her. Shoshana Bean stated on Seth's Broadway Chatterbox years ago that she felt the score was a breeze once she got all of the staging down. I wonder how her voice could handle the score now, though. Eden Espinosa tossed in her signature sass after a performance or two, and Kristy Cates was just effing phenomenal. What an incredible group of performers!
On a similar note, Megan Hilty was a much better G(a)linda than Chenoweth.
Jessica Phillips was far superior, at least vocally, than both Mazzie and Ripley in Next to Normal.
Haven Burton was a stronger Fiona than Sutton Foster in Shrek. (She has one of the strongest mixes, ever.)
Loni Ackerman puts Lupone to shame with her powerhouse vocals from Evita.
Jay Armstrong Johnson was an incredibly strong Claude in Hair with vocals that rivaled Creel's, but I don't know if either one of them is "better" than the other.
I guess I have an understudy fetish?
I know, right?