Those last two have already been mentioned.

I think this list includes all the ones already named in this thread who meet both criteria (folk musicians at least at some points in their careers plus deceased):

Derroll Adams
Declan Affley
Dave Alexander
John Antle
Gerry Armstrong
Clarence Ashley
Alex Atterson
Cliff Aungier
Hoyt Axton

Vic Baker
Long John Baldry
Charlie Bate
Rabbidy Baxter
Bob Beers
Evelyne Beers
Dominic Behan
Paddie Bell
Peter Bellamy
Steve Benbow
Bob Bertram
Rachel Bissex
Elmer Bleaty
Bob Blue
David Blue
Harry Boardman
Hardtack Bob
Raphael Boguslav
Mark Bolan
Ciaran Bourke
Jumbo Brightwell
Big Bill Broonzy
Tim Buckley
Jeff Buckley
Billy Buntline
Robert Byrd

Isla Cameron
John Allan Cameron
Hamilton Camp
Alex Campbell
Tony Capstick
Roger Carmen
Barbara Carns
Anita Carter
Dave Carter
Helen Carter
June Carter Cash
Johnny Cash
Eva Cassidy
Harry Chapin
George Chudakoff
Bobby Clance
Liam Clancy
Paddy Clancy
Tom Clancy
Paul Clayton?
Vassar Clements (fiddler)
Buzz Collins
Johnny Collins
Ted Comben
Susan Contento
Graham Cooper
Bob Copper
James "Brasser" Copper
Jim Copper
Ruth Copper
Libba Cotten*
Brian Crawford
Jim Croce
Elizabeth Cronin
Liz Cruickshank
Tony Cuffe

Cyril Davies
Jinx Davis
Reverend Garry Davis
Jeanine Deckers**
Jim Delahunty
Maureen Delgrosso
Sandy Denny
John Denver
Erik Darling
Bud Dashiell
Diz Disley
Denny Doherty
Lonnie Donegan
Malcolm Douglas
Nick Drake
Ronnie Drew
Johnny Duncan
John Dunkerley
John Dwyer

Jonathan Eberhart
Travis Edmundson
Cass Elliott
John England
Seamus Ennis
Freyda Epstein
Tommy Eytle

Richard Farina
Mimi Baez Fariña
Richard Farrelly
Jimmy Ferguson
Rick Fielding
Barry Finn
Dan Fogelberg
Jackson C. Frank
Focslehead Fred
Louie Fuller


Jerry Garcia
George Gelton
Siwsann George
Fred Gerlach
Bob Gibson
Terry Gillikson
Joe Glazer
Tom Glazer
Cynthia Gooding
Steve Goodman
Lou Gottlieb
Davy Graham
Cy Grant
Dave Guard
Roy Guest
Isaac Guillory
Woody Guthrie

Lesley Hale
Cliff Hall
Robin Hall
Tim Hardin
Bob Hart
Tim Hart
Frank Harte
John Hartford
Bess Lomax Hawes
Ted Hawkins
Mary Ann Haynes
Lee Hays
Hamish Henderson
Joe Heaney
John Herald
Merritt Herring
Walter Hiatt
Lizzie Higgins
Sam Hinton
Fred Holstein
Gilbert (Cisco) Houston
Queen Caroline Hughes
Stan Hugill
Mississippi John Hurt*
Alistair Hulett
Joy Hyman

Hamish Imlach
Brian Ingham
John Isherwood
Burl Ives*

Jill Jackson (Miller)
Stan James
Orville Jenks
Craig Johnson
Brian Jones
Fred Jordan
Vera Johnson
Adrienne Johnston

John Kahn
Rick Keeling
Jo-Ann Kelly
Luke Kelly
Sylvia Kelly
Denis Kevans
Jacko Kevans
Alexis Korner
Bob Kotta
Danny Kyle

Mary LaMarca
Millard Lampell
Eamonn Largey
Kathleen Largey
Sam Larner
Lead Belly*
Bert Lloyd
Geri Lobl
Gerry Lockran
Alan Lomax
Wendy Lowenstein
Bob Lynch

George Maynard*
Sarah Makem
Tommy Makem
Haywire Mac
Margaret MacArthur
Ewan MacColl
Josh MacCrae
Alex MacEwan
Rory MacEwan
Iain MacIntosh
Gerry MacMahon
Miriam Makeba
Keith Marsden
Bogan Martin
John Martyn
George Maynard*
Robert Maxwell
Derek McCormack
Ed McCurdy
Kate McGarrigle
Matt McGinn
Gordon McIntyre
Jimmy McKinley
Ed McCurdy
Lionel McLelland
Francie McPeake
John Meredith
Alan Mills
Richard Mills
Derek Moffat
Bill Monroe
Old Man Mose
John Murphy

Fred Neil
Pat Nelson
Mickey Newberry
June Nichols
Roger Nicholson
John Jacob Niles*
Anselm Noffke (of Germany's Liederjan)

Phil Ochs
Mícheál Ó Domhnaill
Bridie O'Donnell
Odetta
Brian Osbourne

Tom Paley
Dave Parry
Don Partridge
Sandy Paton
Walter Pardon
Daniel Pearl - bluegrass fiddler
John Pearse
Cyril Phillips
John Phillips
Bruce "Utah" Phillips
Cyril Poacher
Bill Price
Joan Prior
Frank Purslow

Russell Quaye

Gene Raskin
Nick Reynolds
Malvina Reynolds*
Jon Rennard
Susan Reed
Jim Reid
Jim Ringer
Ralph Rinzler
Bob Roberts
Jeannie Robertson
Walt Robertson
Paul Robeson*
Stuart Robinson
Jimmie Rodgers (The Singing Brakeman)
"Big" Pete Roger
Gamble Rogers
Grant Rogers
Stan Rogers
Tony Rose

Hazel (King) Sarjeant
Pete Sayers
Martha Schlamme
Helen Schneyer
Richie Schulberg
Alan Scott
Colin Scot
Willie Scott
Joe Scurfield
Al Sealey
Mike Seeger
Peter Sellars
Rod Shearman
Irwin Silber
Nina Simone
Shel Silverstein
Phoebe Smith
David Spence
George Spicer
Ron Spicer
Bob Spray
Jo Stafford
Art Stamper
Davy Steele
Belle Stewart
John Stewart
Michael Stewart
Walkin' Jim Stoltz
Don Stover
John Strachan
Redd Sullivan
Yma Sumac

Phil Tanner
Cyril Tawney
Sonny Terry
Scan Tester
Jake Thackray
Theresa Tooley
Artie Traum
Mary Travers
Paddy Tunney

Harry Upton

Dave Van Ronk
Townes Van Zandt
Mervyn Vincent

Terry Wadsworth
Gordon Waller (of Peter and Gordon)
Don Walser
Vaughn Ward
Lal Waterson
Merle Watson
Rowan Webb
Fred Wedlock
Hedy West
Josh White
Wally Whyton
Hank Williams
Kenneth Williams
Vikki Williams
Roy Williamson
Frank Winter
Martin Winsor
Norman Wisdom
Kate Wolf
Royston Wood
Oscar Woods
Brenda Wootton
Jonathan Wootton
John Wright

Warren Zevon


*would be 100 y.o. or older now
** Sister Luc Gabriel, Soeur Sourire, "The Singing Nun"



I may have omitted a couple of the ones who would be WAY over 100 by now.