Between The Taming of the Shrew, A Midsummer Nights Dream, and Twelfth Night which play shows the theme of "Unrequited love" best?

I would say "A Midsummer Night's Dream," the relationships in the play are far more complex, and each of the characters becomes an example at one point or another. The balance of humor and surprise add to the confusion and make the eventual declarations of true love even more meaningful.