I'm late to the party but can we include vocals to the discussion?
Robert Plant, I know I know a little cliche
Steve Tyler
Bono, favorite would be the song Bad
So many great vocalists with so many ranges. I personally enjoy a smokey crunchy voice like Bruce Springsteen, Kim Carnes, Kenny Rogers, Bill Medley, Stevie Nicks, Rod Stewart. Pure entertainment seeing them live but technically not great singers.