I didn't say Celine Dion screams; she very much sings. I said rap is 'no more "glorified talking" than Celine Dion is "glorified screaming"'. I don't know what glorified screaming is, by the way - nor do I know what glorified talking is.
FWIW, I would never have posted rap artists in this thread, if only because I understood the term "singers" to mean in this context a
specific style of singing. I was just trying to defend rap as a genre against a rather broad dismissal.
That's not to say (in a thread titled "Greatest Voices") that
Q-Tip's voice isn't the most soothing, comforting and familiar voice I've heard.
If "soothing", "comforting" and "familiar" aren't in some way indicators of a "great singing voice", then I dunno what is.
I posted the Silver Mt. Zion song so that people could listen to my previous recommendation in this thread, Efrim Menuck. Great voice; my favourite band, maybe.