Bob Welch killed himself at 66, apparently after suffering health problems. (Heroin will do that to you.) His singing and guitar work were my constant companions in the early to mid-seventies, when I was in college, because I loved Fleetwood Mac before the Stevie Nicks era._ That's Bob Weston in the white. Welch and Christine McVie share vocals.
"Sentimental Lady" from Bare Trees, with Bob Welch on lead vocal. This 1972 record was one of my favorites. A lot of Bare Trees was Danny Kirwin, but Bob Welch was an integral part of the band's sound.
"Emerald Eyes" from Mystery to Me
"Why" with Christine McVie's vocal.
Here's a live version, after Buckingham/Nicks joined the band: