I can't name just one. There's four or five authors that I think are on my tops.
I'll name Ayn Rand first since I've already mentioned her before in a post somewhere else on the board. I always enjoy reading her descriptions, her characters, and her thoughts.
Another one is Matthew Pearl. If no one knows who he is, he is basically a historical mystery writer. His first novel, The Dante Club, is a novel about a series of murders based on Dante's Inferno and the actual Dante Club, headed by Longfellow, have to solve the mystery first so that the police will not suspect them since they are the only ones who knows of the Inferno. The second is The Poe Shadow...a novel based on the mysterious death of Poe and a young attorney trying to discover the truth. He actually did some heavy research into it all so he could use things for the novel.
Another would be Isaac Asimov. I'm not very fond of Science Fiction...but something about Asimov kept me clinging.
The next would be Alexandre Dumas...Primarily The Count of Monte Cristo. It is possibly my favorite book of all time...or at least right up there with Atlas Shrugged.
Finally, but not least...Dante Alighieri. I fell in love with Dante when I was 13 and haven't been able to stop reading him yet. I have 3 translations of the Divine Comedy and four translations of the Inferno. He is probably my favorite of all. Not only his writings, but his life and the world he also opened up for me.
The hottest places in hell are reserved for those who, in times of great moral crisis, remain neutral.