I think Diana Wynne Jones is one of the greatest fantasy authors of all time. Her series "The Dalemark Quartet" is a good epic fantasy. However, I highly recommend her spoof guidebook "Tough Guide to Fantasy Land" and her novel "The Dark Lord of Derkholm." "Tough Guide" pokes fun at epic fantasies in general. It's a glossary of witches, dark citadels, and magic swords. The second is a novel that, in a way, goes along with the guide. In it, a regular world forces a magical world to host epic quests for tourists. The magical world is nearly ruined by this as the tourists are constantly "pillaging" their lands as part of the tours. The magical residents do not have time to take care of their world as they are playing characters such as dark lords and enchantresses. In the novel, a mild mannered wizard named Derk is chosen to play the dark lord. Even while pretending to die at the hands of the heroic tourists, he and his family must find a way to save their world from the destructive tours.
It's great how Jones good-naturedly uses the tours to poke fun at epic fantasies. The characters in the novel are told they must act in a certain way--as one might expect from stock fantasy characters. The tourists are upset when their adventures are not epic enough.
It's a great read, and I recommend it, especially if you've read many other epic fantasies!