I enjoyed SteveAzo's list "Screenrant's 10 Great Movies Where the Heroes Were the Villains All Along." This is a similar list from Ranker.com.
"Movie 'Heroes' Who Were Actually Villains The Whole Time" by Ann Casano. Ranker.com. Updated November 10, 2023.
From the original article: "Sometimes, our favorite movies are actually secretly terrifying ... these heroes who act like villains are just pretending to be good guys. For example, is Leonard from Memento really the sympathetic amnesia-afflicted pseudo-detective who only wants to find justice for his wife? Or, is Leonard much more sinister, simply someone in need of the chase? Regardless of any feelings of blind admiration, it's important to examine our idols critically. It makes you realize that some of your favorite protagonists are actually the worst movie heroes in history."