Angel Densetsu, Ore Monogatari!! Recommendations
Angel Densetsu is a shounen while Ore Monogatari is a shoujo so their focuses are a bit different: one focusing more on juvenile delinquent comedies, while the latter focuses more on romance. But both series are about an intimidating looking, but kind-hearted young man wins over friends (and a girlfriend!) while primarily employing misunderstandings to keep the conflict and comedy going.
Both protagonists are misunderstood guys with hearts of gold who eventually find a girl who can appreciate them for who they are. Both use misunderstandings about the protagonist, based on his appearance, to drive the comedic elements of the story.