A Video of Matt Laurent (who has played Quausimodo over 400 times) sings Dance my Esmeralda on a Russian TV show.
http://www.youtube.com/watch?v=JBegUUnCdF0
I think he does a great job. He really does make some of the more awkward lines work. The arrangement is a bit more of a pop sound than in the show. I find it cute that he does that head tilt back move that you see Garou do a lot ( at 0.48). Maybe now it’s just a Quasimodo gesture to get the right tone of voice, but I alway associate that head tilt with Garou.