From his prototype suit in Jon Favreau’s 2008 MCU kick-off film, to the nanotech armor that effectively, yet fatally, helped craft an impromptu Infinity Gauntlet in the final act of Avengers: Endgame, Tony Stark, as played to perfection by Robert Downey Jr., has shown off an impressive arsenal of Iron Man suits throughout the franchise. In addition to the fact that his upgrades are frequently a response to battle damage (not to mention his own destruction of the Iron Legion), his suits have traditionally featured something fresh and exciting to unveil with each new edition, both from a technical and artistic perspective.
Article source: https://www.cinemablend.com/news/2552908/tony-starks-mcu-iron-man-suits-ranked