The famous fictional Spaniard known as "the Man of La Mancha" is Don Quixote. He is the protagonist of Miguel de Cervantes' novel "Don Quixote" and is characterized as a gentleman from the region of La Mancha in Spain who imagines himself a knight-errant set on reviving chivalry and righting wrongs.
The other options:
- Zorro is a different fictional character, a masked vigilante.
- Tartuffe is a character from a Molière play, not Spanish.
- Mephistopheles is a figure from German legend, associated with Goethe's Faust.
Thus, Don Quixote is the Man of La Mancha.