OK, here are the first 100 names:
Eyewitnesses in Dealey Plaza
Abraham Zapruder (filmed the assassination)
Bill Newman (witness)
Gayle Newman (witness)
Jean Hill (witness)
Mary Moorman (witness, took famous Polaroid)
Beverly Oliver (claimed to be the "Babushka Lady")
Orville Nix (filmed the assassination)
Charles Brehm (witness)
Amos Euins (witness)
James Tague (wounded near Dealey Plaza)
Police & Secret Service Officials
J.D. Tippit (Dallas police officer killed after JFK's assassination)
Marrion Baker (motorcycle officer, entered the TSBD immediately)
Sam Holland (railroad worker, saw suspicious activity on the grassy knoll)
Ed Hoffman (claimed to see a shooter on the knoll)
Seymour Weitzman (found the “Mannlicher-Carcano” rifle)
Roger Craig (Dallas deputy sheriff, controversial statements)
Earl Cabell (Dallas mayor, brother of CIA deputy director Charles Cabell)
Jesse Curry (Dallas police chief)
Forrest Sorrels (Secret Service, protected JFK)
Winston Lawson (Secret Service, planned the motorcade route)
People Connected to Lee Harvey Oswald
Marina Oswald (Lee Harvey Oswald’s wife)
Marguerite Oswald (Oswald’s mother)
Robert Oswald (Oswald’s brother)
Ruth Paine (Oswald’s acquaintance, let Marina live with her)
Michael Paine (husband of Ruth, worked in military contracting)
Buell Wesley Frazier (drove Oswald to work on Nov. 22, 1963)
Linnie Mae Randle (Buell Frazier’s sister, saw Oswald with a package)
George de Mohrenschildt (CIA-linked geologist, befriended Oswald)
Jeanne de Mohrenschildt (wife of George, knew Oswald)
Silvia Odio (claimed Oswald met with anti-Castro Cubans before assassination)
Intelligence & Government Figures
James Jesus Angleton (CIA counterintelligence chief)
David Atlee Phillips (CIA officer involved in anti-Castro operations)
E. Howard Hunt (CIA, later involved in Watergate)
Richard Helms (CIA director, knew of Oswald’s file)
Charles Cabell (Deputy CIA Director, fired by JFK)
William King Harvey (CIA, involved in anti-Castro plots)
John McCone (CIA director during the assassination)
Fletcher Prouty (Air Force, claimed CIA involvement)
Allen Dulles (ex-CIA director, on Warren Commission)
David Sanchez Morales (CIA operative allegedly linked to assassination)
Organized Crime & Cuban Exiles
Jack Ruby (killed Oswald)
Sam Giancana (Chicago mob boss, had links to the CIA)
Johnny Roselli (Mafia-CIA liaison)
Carlos Marcello (New Orleans mob boss, suspected of JFK plot)
Santo Trafficante Jr. (Tampa mob boss, involved in anti-Castro plots)
David Ferrie (pilot, knew Oswald, linked to New Orleans mob)
Clay Shaw (New Orleans businessman, accused by Garrison)
Sergio Arcacha Smith (anti-Castro activist)
Frank Sturgis (anti-Castro operative, later Watergate burglar)
Eladio del Valle (Cuban exile, allegedly linked to Ferrie)
Warren Commission & Other Government Figures
Earl Warren (Chief Justice, led Warren Commission)
Gerald Ford (Warren Commission member, later U.S. President)
Arlen Specter (proposed the "Single Bullet Theory")
Richard Russell Jr. (Senator, skeptical of Warren Report)
John Sherman Cooper (Senator, Warren Commission member)
J. Lee Rankin (Warren Commission lawyer)
Lyndon B. Johnson (JFK’s vice president, became president)
Robert F. Kennedy (Attorney General, later assassinated)
Nicholas Katzenbach (Deputy Attorney General, pushed for lone gunman theory)
Herbert Hoover (FBI director, controlled investigation)
Additional Eyewitnesses & Researchers
Mary Pinchot Meyer (JFK mistress, murdered, had CIA links)
Beverly Oliver (claimed to be "Babushka Lady")
Eugene Dinkin (NSA cryptographic operator, claimed foreknowledge)
Chauncey Holt (claimed to be a "tramp" at Dealey Plaza, CIA ties)
Richard Sprague (House Select Committee investigator)
Dr. Charles Crenshaw (Parkland doctor, disputed official account)
Malcolm Perry (Parkland doctor, initially described throat wound as entry wound)
William Greer (Secret Service driver of JFK’s limo)
Roy Kellerman (Secret Service agent in JFK limo)
Clint Hill (Secret Service agent, jumped onto JFK’s car)
Jack Dougherty (TSBD employee, possibly near Oswald)
Harold Norman (TSBD worker, heard shots from above)
Eddie Piper (TSBD janitor, saw Oswald before shooting)
Julia Ann Mercer (saw men with rifles near Dealey Plaza)
Gordon Arnold (claimed to be near the knoll, saw suspicious activity)
Aubrey Rike (handled JFK’s body at Parkland)
Richard Randolph Carr (saw suspicious man flee TSBD)
James Files (claimed to be second shooter, controversial figure)
J. Walton Moore (CIA officer in Dallas, allegedly linked to Oswald)
Victor Marchetti (CIA officer, skeptical of lone gunman theory)
Ted Shackley (CIA operative, linked to anti-Castro operations)
John Martino (mobster, claimed conspiracy knowledge)
E. Howard Hunt Jr. (CIA officer, linked to various covert operations)
Louis Bloomfield (Canadian businessman, suspected intelligence links)
Joseph Adams Milteer (ultra-right activist, allegedly predicted JFK’s death)
Paul Kangas (private investigator, researched JFK case)
Richard Nagell (ex-intelligence, claimed to know about Oswald)
Suspicious Deaths of Key Witnesses
Dorothy Kilgallen (journalist investigating Ruby, died mysteriously)
Bill Hunter (journalist, shot in police station)
Jim Koethe (journalist, murdered in home invasion)
Gary Underhill (intelligence insider, shot himself under suspicious circumstances)
Thomas Hale Boggs (Warren Commission member, disappeared in plane crash)
Buddy Walthers (Dallas deputy sheriff, died in suspicious circumstances)
Lee Bowers (witness, saw activity on the grassy knoll, died in car crash)
Charles Harrelson (hitman, claimed knowledge of JFK assassination)
George Krutilek (mob accountant, found dead)
John Roselli (mobster, found murdered in a barrel)
Richard Cain (Chicago cop linked to the mob, murdered)
Joseph Milteer (far-right extremist, predicted JFK assassination in advance)
Hale Boggs (Congressman, Warren Commission member, plane disappeared)
Of course, there are more. Some previously mentioned.