simpleton

He was a soldier simpleton who appeared in comic drawings about life in the army in the 1890s.

DeSantis is a smart guy trying to run as a simpleton.

But it's also the type of suggestion a grasping simpleton would make, someone who knows the letter of the law but doesn't respect what it's there to protect or prevent.

Characters with disabilities are often cast as villains, superpowered by disability, victims, the butt of a joke or simpletons rather than fully realized humans.

Adam Hugill is similarly amusing as the defender Harry Maguire, who is portrayed as a lovable simpleton — not the sharpest tool in the box, but solid and dependable.