I think their characters not ending up together adds beauty in it. There's a great chemistry between them that doesn't need to be romantic to work so well.
To be honest listening to his Kentucky sounds English when it should sound southern or at least your “general American” accent. But definitely has a little English twang. Weird.
Johnny Depp: Willy Wonka Victor Van Dorts Sweeney Todd The Mad Hatter Barnabis Colins Tonto Helena Bonham Carter: Mrs. Bucket Emily Mrs. Lovett The Red Queen Dr. Hoffman Ivory Leg