When we think about the wealthiest fictional characters in the Marvel Cinematic Universe (MCU), one name immediately comes to mind: Tony Stark, also known as Iron Man. Created by Stan Lee, Larry Lieber, Don Heck, and Jack Kirby, Tony Stark made his first appearance in Tales of Suspense #39 in 1963. Since then, his character has evolved into one of the most beloved superheroes, portrayed by Robert Downey Jr. in the MCU.