I see your Sandy Denny and raise a Judith Durham.
Steven Tyler
Dion DiMucci
Judy Collins
Tony Williams (Platters - Only You)
Jack Bruce
Grace Slick
Lindsey Buckingham
George Jones
Bobby Vinton
Hillary Scott (Lady Antebellum)
Dolly Parton
Cass Elliot
Roy Orbison
Gene Pitney
Jim Morrison
Jackie Wilson
Diana Ross
Tortelvis (Dred Zeppelin)
Bonnie Raitt
Bon Scott
Pick any Gibb brother
There are so many. Trying to fit them into the top 100 is a silly task, but it serves to remind us how many great and varied voices we get to hear since the advent of recording.
It took 76 posts to mention Jim Morrison, the Lizard King.
Sandy Denny, No End: https://www.youtube.com/watch?v=V377v6BAbOE