Othello
Key themes of the play involve the passions of the lover and jealousy. Who besides Othello shows jealousy of a loved one?
Act 3
Act 3
Brabantio might be considered a jealous father. His daughter would definitely be considered a loved one.
I don't believe that any other character displays jealousy of a "loved one," but Iago's hatred of Othello is in fact based upon jealousy.
Othello