Who do you think are some of the greatest singers?

Maybe not the greatest but some good ones: Tarja Turnen(Nightwish), Freddie Mercury(Queen), Michael Jackson, Thom Yorke(Radiohead), Bruce Dickinson(Iron Maiden), Kyo ( dir en grey), Alison Goldfrapp(Goldfrapp), Gackt(Malice Mizer), Damon Albarn(Blur Gorillaz The good the bad and the queen) and Roger Daltrey(The Who) so who do you think are the best singers or your favourites.