Who do you consider a Great Author of the last 50 years or so (first well-known work after 1970)? I'd like to get a feel for who's who in modern literature. Any language/culture. Fiction only.

I'm going to repeat Ursula K Le Guin and Margaret Atwood because it's hard to overstate how much of everything is in their works. Iain (M) Banks I'll also echo, but will add China Miéville because there aren't enough anarchists in this thread.