As You Like It
The brilliance of As You Like It, one of Shakespeare’s best comedies, lies in its compelling characters, particularly Rosalind, its heroine, and Jacques, its dejected traveler. In fact, Jacques delivers the “All the world’s a stage” speech in Act 2, Scene 7, as well as many other impactful soliloquies. His role in As You Like It is unique, as the “only purely contemplative character in Shakespeare. He thinks, and does nothing. His whole occupation is to amuse his mind, and he is totally regardless of his body and his fortunes. He is the prince of philosophical idlers; his only passion is thought; he sets no value upon anything, but as it serves as food for reflection (William Hazlitt).” Rosalind, as well, is a unique character, as an active and masculine but still heroic female, unusual in Shakespeare’s plays. Her rejection of traditional femininity solidifies As You Like It as one of Shakespeare’s most progressive plays.

Titus Andronicus
A personal favorite, Titus Andronicus, one of his earliest plays, follows the titular character, a Roman general, after he enslaves Tamora, Queen of the Goths, who vows to take revenge. Though it is often considered unsophisticated for its gratuitous violence, its explorations of the depths of human depravity has merit of its own. Despite its assessment from T.S. Eliot as “one of the stupidest and most uninspired plays ever written,” it was very popular in its time and is representative of his ability to evoke powerful emotion. The gratuitous violence is also no doubt inspired by itself; for example, Titus Andronicus bakes Tamora’s sons’ heads into pies and grinds their bones into powder to serve to Tamora.

Coriolanus
Coriolanus, though obscure, is of the same quality as his great tragedies such as King Lear and Hamlet but has one quality that makes it unique among his tragic works. First, its hero, the titular character, is unusual in that he keeps to himself more than his more reflective peers who use far more soliloquies. This often makes him less sympathetic to audiences than the other tragic heroes, which makes for an unfamiliar and engaging reading and viewing experience.

Romeo and Juliet
While this is technically not an unknown or obscure play and is actually arguably his most well-known play, it is still underappreciated and deserves to be elevated to the status of the rest of his great tragedies. The language alone deserves several articles dedicated to its pure beauty and all its layers. One example of the pure perfection of its language among the many present in this play is Romeo’s flirtation in Act 1 Scene 5.
"If I profane with my unworthiest hand
This holy shrine, the gentle sin is this:
My lips, two blushing pilgrims, ready stand
To smooth that rough touch with a tender kiss. "

Cymbeline
“Cymbeline” is a unique fusion of of tragedy, comedy, romance, and history that keeps the audience engaged by its shifting but not jarring tones and style. It also boasts one of the most compelling heroines of all of his works (Imogen) and a memorable villain with a novel redemption arc (Iachimo). “Cymbeline” also has beautiful language, with the song in Act IV, Scene 2 as a notable example.