This is actually the plot of a Greek movie, ngl xD BUT it's very dramatic and emotional.

A sailor who is lower middle class or higher working class is in love with a woman and promises to marry her after he's back from sailing and he's made money. While he's sailing, the girl's family marries her off to someone wealthier. When the sailor guy returns, he's heartbroken and marries her younger sister out of spite.

Lots of angst and unrequited love potential and they can be tied to J. Alfred Darrow too!