Interesting topic. Tony is truly a legend that has bridged several generation gaps. I can't think of another singer in his or her 80's that is still doing the college circuit.

Several other super-stars,past and present, who have very distinctive voices who I admire:
George Jones
Earth Kitt (previously mentioned)
Ray Charles
Willie Nelson (although some of his timing bothers me.)
Joe Cocker
Gary Diamond (just checking to see if you are paying attention.)
Tina Turner
Etta James
Diddy (NOT)

I am sure there are others, but these are the first that come to mind.

Eddie