Scholar, aesthete and brilliant social observer, Oscar Wilde wrote plays, novels, poetry, children's stories, short stories, letters and diaries. Some of them are very hard work, but pretty much all contain moments of brilliance.
And of course he produced some of the finest one-liners that the modern world has know - which inspired the Monty Python sketch that your title alludes to.
The Oxford Companion to English Literature hails his commercial successes as Lady Windermere's Fan (1892), A Woman of No Importance (1893), and An Ideal Husband (1895). It acclaims The Importance of Being Earnest (1895) as 'his masterpiece'.