Hmm... let's see... I do like the fantasy genre quite a bit, but most of the reading I've been doing lately has been involving manga... But, nontheless... my top three favorite fantasy authors would have to be (in no specific order):
• A.J. Lake - It almost feels like I'm the only person who is familiar with A.J. Lake. I'm not sure how many books she has written, but I was really into her The Darkest Age trilogy. It was about a group of people blessed with the gift to look through other people's eyes--called the Ripente. And a mystical sword that is meant to slay the Norse Deity, Loki. It's actually a really touching series.
• Rick Riordan - I think Percy Jackson and the Olympians might count as fantasy--well, Greek Mythology kind of has a fantasy-esque feel to it, so... why not? Rick Riordan is excellent at twisting the known stories about the Greek Mythology and creating his own characters within "Camp Half-Blood". A very excellent series. If you are unfamiliar with the basic plot of the series, it's pretty much about a boy named Percy Jackson, who is demi-god--a child of a Greek god and a human. The big deal is that he is the song of Poseidon and there is a prophecy about a child of the big three--Zeus, Poseidon, and Hades--that makes a decision that leads to the prosperity or downfall of Mount Olympus. There are technically five books in ther series, but Riordan has begun writing an indirect sequel story that fits into the prophecy given at the end of the last book in the series.
• J.K. Rowling - Of course! You can't think of the fantasy genre without having her cross your mind, now, can you? x) I'm not an über Harry Potter fan or anything, but the overall creativity of her series is just absolutely incredible. Everyone should know Harry Potter one way or another, so I don't think I really need to give any explanation on this one. xD