The illustrator of the novel 'Don Quixote' is Gustave Dore, a French artist and engraver who lived from 1832 to 1883. He was known for his illustrations of literary works, including Dante's Divine Comedy, Milton's Paradise Lost, and Cervantes' Don Quixote. His work on Don Quixote is considered to be some of his best, and it has been praised for its ability to capture the spirit of the novel.