John Mayall is NOT dead!
News of his death was a hoax, I believe.
(I also saw him perform live too! Great show!)
George Carlin
Steve Clark (def leppard guitarist)
Ty Longley - great white guitarist
Jan Kuehnemund - guitarist vixen
Ronnie James Dio - Dio, Black Sabbath
Glenn Yarbrough (d. Aug. 11, 2016) with the Limeliters at Alameda County Fair.
Johnny Cash, twice, at the late lamented Circle Star Theater in San Carlos, CA, and at the Mid-State Fair in Paso Robles, CA.
Waylon Jennings (d. Feb. 12, 2002) at the late lamented Circle Star Theater.
Peter, Paul, and Mary at the late lamented Circle Star Theater.
Waaay back when I was a widdle kiddie in the 1960’s: Ethel Merman in a performance of Call Me Madam in the San Fernando Valley.
Marcel Marceau (d. Sept. 22, 2007) at Zellerbach Auditorium at U. C.Berkeley.
Both Peter Yarrow and Paul Stookey are alive; Mary Travers and Circle Star Theater are not.
Roy Clark (Kennedy Center)
Danny Gatton (when he was the house band at Club Soda in DC)
Root Boy Slim (I had to step over his drunk, passed-out ass to get into the men’s room at Tornado Alley; later I saw him living in his ex-bandmate’s basement)
John Prine (University of Virginia)
Regarding Ray Davies: YAHOO says he died in 2017. WIKI says he’s still alive. His own website just says there are no upcoming tour dates, so that could go either way.
Chuck Berry
Johnny Cash
Duke Ellington (when I was 14 years old)
God, too, too many.
Rush - Neil Peart is dead. That’s still painful.
Freddie Mercury
Chuck Berry
Scott Weiland - I saw him solo, not with STP
John Entwhistle
John Denver
Chris Cornell
Tom Petty
Jerry Garcia
Dennis Wilson
Joey Ramone and others
Michael Hutchence
Bo Diddley
John Lee Hooker
Clarence Clemons
Too many more. I’m not a young man anymore. It’s only going to get longer.
I’m pretty sure the vast majority of performers that I have seen perform live are now dead.
The musical ones off the top of my head:
Victor Borge, Beverly Sills, Andre Previn, Sergiu Comissiona, Mstislav Rostropovich, Carol Channing, Kenny Rogers, Roy Clark, Ralph Stanley, Merle Haggard, George Jones, Waylon Jennings, Freddy Fender, Tommy Makem, and Frenchie Burke.
Frenchie Burke was as good a raconteur as he was a musician, and a lot of fun. He sat with my group and shared our shrimp and oysters once at the Fulton(TX) Oysterfest and later sent a round of beer to our table.
OK, anybody who buys me beer gets a good review 
Perhaps we can also include speeches or presentations by notable writers, scientists, etc.? I see already a mention of Hunter S. Thompson and Kurt Vonnegut in Post #39.
My contribution to this genre:
Ray Bradbury (d. June 5, 2012), sci-fi writer, gave keynote address at dedication of new Paso Robles Public Library, circa mid-1990’s.
(I was about to mention Richard Bach also, but in an abundance of fighting of ignorance, I looked him up first, and Lo! he’s still with us!) You do all remember who Richard Bach is, right?
Aviator, aerobatic pilot, author of Jonathan Livingston Seagull
Adam Schlesinger
Rory Gallagher
Toy Caldwell (Marshall Tucker Band)
Chris Squire
Les Paul
Rudy Valee, 1975 How to Succeed in Business Without Really Trying
Mose Allison, 1991? (1992?) Cafe Lido, Balboa Island
Milt Hinton, 1993(?) Newport Beach
Lemmy
David Bowie
Stevie Ray Vaughn
The Ramones
Stevie Ray Vaughn, Doc Watson, Merle Watson, John Prine, Jerry Reed, Rick Danko, Levon Helm, Tom Petty, Dave Van Ronk, Clarence “Gatemouth” Brown, Dick Gregory, Townes Van Zant, Johnny Shines.
In the 2 years since my last post we’ve lost…
Ric Ocasek (The Cars)
Ian Gibbons (The Kinks)
Dick Dale
Stanley Donen - spoke at a retrospective of his films at UCLA
Well, shit. Gotta add…
Charlie Watts
Dusty Hill (ZZ Top)
Edward Van Halen
The Ramones. The original lineup, at CBGB, in 1977 and 1978. A bunch of times.
Yes, I’m old.
John Denver
The Cowsills
The Supremes
Paul Revere and the Raiders
Helen Reddy
Herman’s Hermits (one dead)
Arthur Fiedler
Everybody else is alive.
Tom Petty
Lemmy Kilmister (Motorhead vocalist/bassist)
Brad Delp (Boston vocalist)
Chris Squire (Yes bassist)
Mary Travers (Peter, Paul and Mary)
And, probably a few other band members whom I’m not thinking of right now.
Robert Ward (Ohio Players)
Brad Delp (Boston)
Leonard Cohen
Leon Russell (show with Dylan and I actually liked Russell more that evening)
Walter Becker (Steely Dan)
I bought a number of The Clancy Brothers albums back in my folky days. They put on a good show.
I didn’t mention Glenn Yarbrough above. He was a founding member of The Limelighters and he did a college concert at the University of Alaska, where I was attending at the time. That was in the mid-60s.
I saw The New Christie Minstrels live in the 60s. There have been so many members of that group over the years that some of the originals must be dead.
I saw jazz bassist Eugene Wright at the same time I saw Brubeck in Moscow. He just died last year.