Coverdale, Halford, Gillan, Hughes, Dio, Paul Rodgers, Steve Perry, Robert Plant, Paul McCartney, Steve Marriot, Graham Bonnet, Rod Stewart, Noddy Holder, Axel Rose (yes, he's technically a very good singer) etc if you like people that actually sing well.
If an original, immediately recognizable and not easy to copy voice is good enough for you, even without acrobatics, then add Ozzy, Jagger, Bowie, Ric Ocasek and Tom Petty, Neil Young, Ian Hunter to the list.
Me, I have developed a weakness for Ex-J. Geils man Peter Wolf. He has a bit of Jagger in him, but not nearly as mannered and more masculine. His voice seems to get better and better with age and the new solo album is a treat.
And if you like several singers in one person then give Scott Weiland a listen!