To be fair, when I first heard "Stayin' Alive" and later "Night Fever", I thought the songs were being sung by a black woman. It was also a shock to me to learn that sound was coming out of a white guy.
Same thing with the "Righteous brothers."
Ben Caplan also had that effect on me. He sounds like an old school black blues singer.
https://www.youtube.com/watch?v=9PTSOKDa0NI