In the Marvel Universe, the title of the smartest Avenger is often attributed to two characters: Tony Stark (Iron Man) and Bruce Banner (Hulk).
Tony Stark, known for his genius-level intellect and technological expertise, is a brilliant inventor and engineer. He has created advanced suits of armor, including the iconic Iron Man suit, and has made significant technological advancements that have greatly benefited the Avengers.
Bruce Banner, when not transformed into the Hulk, is a highly intelligent scientist specializing in gamma radiation and biochemistry. His intellect allows him to make breakthroughs in various scientific fields, and his knowledge has been instrumental in understanding and dealing with various threats.
Both Tony Stark and Bruce Banner have been portrayed as the brains behind many of the Avengers’ strategies and technological advancements. They often work together, combining their scientific knowledge and problem-solving abilities, to tackle complex challenges.
It’s important to note that intelligence can be measured and utilized in different ways, and other Avengers like Black Panther (T’Challa) and Doctor Strange (Stephen Strange) are also highly intelligent in their respective fields of expertise. However, in terms of the overall recognition and reputation for being the smartest Avengers, Tony Stark and Bruce Banner are often at the forefront.