This has technically already been asked, but it was a Phantom vs Raoul thing and didn't really compare the actual singing voices. (And FYI, both Raoul and the Phantom are tenor roles. They have almost the exact same range.)

Magaret Preece, who did the dubbing for Carlotta, was definitely the best singer there in my opinion even though she was exaggerating her sound for the movie.

Please add anyone I forgot who sang.

He, Emmy or Jennifer. I don't know about Jennifer (Meg) since she really doesn't sing enough to show how great her voice actually is but she really sounded veeeery beautiful.

Emmy's voice is wonderful too, but I think Patrick's is a bit stronger in general while it's also great.

Emmy would have been better if she had been singing within her range, rather than trying to stretch up to high notes she did not possess. Patrick would have also been better if he hadn't been holding back. The managers were inconsistent, I felt. And I agree that Meg didn't sing enough to get an accurate feel for her vocal ability. And Gerard Butler sounds like a moose in heat.

gerard

Emmy, Gerard and Patrick are all three wonderful singers. :-)