The full list of creator credits can be found here.
Jack Kirby: creator of Chadwick, an elitist who believes himself above other Americans and belongs to a secret criminal society (Captain America #195, 1976); co-creator of Captain America, Steve Rogers, a patriotic wartime hero (Captain America Comics #1, 1941); of S.H.I.E.L.D., an international espionage agency; of Stark allied with S.H.I.E.L.D.; of Stark designing a flying car (Strange Tales #135, 1965); of Jason Wilkes, a scientist whose research into alternative forms of energy causes him to be trapped in an alternate dimension, losing his ability to interact with the world around him; of Wilkes being employed by criminals to profit from his research (Tales of Suspense #25, 1962); of Jarvis, a butler who serves Tony Stark's family (Tales of Suspense #59, 1964); of Peggy Carter, intelligence operative and wartime love interest of Captain America (Tales of Suspense #75, 1966); of the Secret Empire, a clandestine criminal organization (Tales to Astonish #81, 1966)
Stan Lee: creator of the title "Tales of Suspense" (Tales of Suspense #1, 1959); co-creator of S.H.I.E.L.D., an international espionage agency; of Stark allied with S.H.I.E.L.D.; of Stark designing a flying car (Strange Tales #135, 1965); of Stark Industries, the Starks' technology company (Tales of Suspense #45, 1963); of Jarvis, a butler who serves Tony Stark's family (Tales of Suspense #59, 1964); of Peggy Carter, intelligence operative and wartime love interest of Captain America (Tales of Suspense #75, 1966); of Whitney Frost, a beautiful woman involved in organized crime (Tales of Suspense #98, 1968); of the Secret Empire, a clandestine criminal organization (Tales to Astonish #81, 1966)
Steve Englehart: co-creator of western heroes such as Kid Colt being real historical figures (Avengers #142, 1975); of Peggy Carter's name (Captain America #162, 1973); of Hugh Jones, director of Roxxon Oil; of Roxxon Oil, a corporation involved in criminal activities (Captain America #180, 1974)
Bill Mantlo: co-creator of Darkforce, a form of black energy which emerges from an alien dimension, has various uses including teleportation (Champions #7, 1976); of a form of mutating matter called "Zero" (Deadly Hands of Kung Fu #23, 1976)
Don Heck: co-creator of Joseph Manfredi, a criminal mob boss (Daredevil #118, 1975); of Howard Stark, head of Stark Industries (Iron Man #28, 1970); of Stark Industries, the Starks' technology company (Tales of Suspense #45, 1963)
Sal Buscema: co-creator of Peggy Carter as an agent of S.H.I.E.L.D. (Captain America #169, 1974); of Hugh Jones, director of Roxxon Oil; of Roxxon Oil, a corporation involved in criminal activities (Captain America #180, 1974)
Gene Colan: co-creator of Whitney Frost's name (Iron Man #1, 1968); of Whitney Frost wearing a golden mask (Iron Man #17, 1969); of Whitney Frost, a beautiful woman involved in organized crime (Tales of Suspense #98, 1968)
Mark Bagley: co-creator of Stark working with gamma rays (Original Sin #3.1, 2014); of Chadwick as a member of the Secret Empire; of Thomas Gloucester, a member of the elitist Secret Empire (Thunderbolts #31, 1999)
Jonathan Hickman: co-creator of Leviathan, a Soviet-made intelligence organization who are enemies of S.H.I.E.L.D. (Secret Warriors #11, 2010); of Howard Stark as an early operative of S.H.I.E.L.D. (Shield #1, 2010)
Archie Goodwin: co-creator of Whitney Frost's name (Iron Man #1, 1968); of Whitney Frost wearing a golden mask (Iron Man #17, 1969); of Howard Stark, head of Stark Industries (Iron Man #28, 1970)
Mark Gruenwald: creator of Jarvis' first name, Edwin (Official Handbook of the Marvel Universe #1, 1983); of Joseph Manfredi's name (Official Handbook of the Marvel Universe #6, 1983)
Kurt Busiek: co-creator of Chadwick as a member of the Secret Empire; of Thomas Gloucester, a member of the elitist Secret Empire (Thunderbolts #31, 1999)
George Tuska: co-creator of Darkforce, a form of black energy which emerges from an alien dimension, has various uses including teleportation (Champions #7, 1976)
Stefano Caselli: co-creator of Leviathan, a Soviet-made intelligence organization who are enemies of S.H.I.E.L.D. (Secret Warriors #11, 2010)
Dick Ayers: co-creator of Peggy Carter, intelligence operative and wartime love interest of Captain America (Tales of Suspense #75, 1966)
Ernie Hart: co-creator of Kid Colt, a cowboy hero garbed in a red shirt, blue jeans, cowhide vest and white hat (Kid Colt #1, 1948)
Joe Simon: co-creator of Captain America, Steve Rogers, a patriotic wartime hero (Captain America Comics #1, 1941)
Carmine Infantino: co-creator of S.H.I.E.L.D. opening offices in Los Angeles, California (Spider-Woman #1, 1978)
George Perez: co-creator of western heroes such as Kid Colt being real historical figures (Avengers #142, 1975)
Robert Bernstein: co-creator of Stark Industries, the Starks' technology company (Tales of Suspense #45, 1963)
Roy Thomas: co-creator of the S.H.I.E.L.D. logo, an eagle within a circle (Strange Tales #154, 1967)
Terry Kavanagh: co-creator of Edwin Jarvis as the family butler to Howard Stark (Avengers: Timeslide, 1996)
Mike Friedrich: co-creator of Peggy Carter as an agent of S.H.I.E.L.D. (Captain America #169, 1974)
Bob Harras: co-creator of Edwin Jarvis as the family butler to Howard Stark (Avengers: Timeslide, 1996)
Roger Cruz: co-creator of Edwin Jarvis as the family butler to Howard Stark (Avengers: Timeslide, 1996)
Jim Steranko: co-creator of the S.H.I.E.L.D. logo, an eagle within a circle (Strange Tales #154, 1967)
Dustin Weaver: co-creator of Howard Stark as an early operative of S.H.I.E.L.D. (Shield #1, 2010)
Marv Wolfman: co-creator of S.H.I.E.L.D. opening offices in Los Angeles, California (Spider-Woman #1, 1978)
Gil Kane: co-creator of a form of mutating matter called "Zero" (Deadly Hands of Kung Fu #23, 1976)
Joe Maneely: co-creator of Kid Colt wearing yellow gloves (Kid Colt, Outlaw #40, 1959)
Stan Goldberg: co-creator of Kid Colt wearing yellow gloves (Kid Colt, Outlaw #40, 1959)
David Kraft: co-creator of the Los Angeles Tribune, a newspaper (Savage She-Hulk #3, 1980)
Mike Vosburg: co-creator of the Los Angeles Tribune, a newspaper (Savage She-Hulk #3, 1980)
Gerry Conway: co-creator of Joseph Manfredi, a criminal mob boss (Daredevil #118, 1975)
Mark Waid: co-creator of Stark working with gamma rays (Original Sin #3.1, 2014)