I am working on a screenplay story now, but so far I do not have a psychological or moral flaw for my MC. It's a crime thriller, and the MC is a cop, solving the case. However, do I need the MC to have a main flaw to carry the character's development? Since it's a screenplay, I use movies for examples, but if you watch movies with cop protagonists in like Bullitt (1968), Speed (1994), and Seven (1995), they not have main flaws. They have little flaws here and there maybe, but they are mostly good men trying to do the right thing, with a good head on their shoulders. They are given their assignments, they do them, and that's it. It gets personal for them later, but there is no personal big flaw they have to overcome or deal with. What do you think?