This is an easy one for me! I cannot recommend this lad enough: David Gemmel.
He writes fantasy novels, swords and sorcery stuff. What makes him stand out by a mile compared to other authors is his ability to explore the greyness of the human condition, the distinction between what is good and what is evil. You end up questioning your own decisions in life reading one of this books somehow!
What also makes him exceptional is that he researches everything completely. He knows weapons, swordplay, his battle descriptions are brilliant, and it goes right down to things like how they manages the horses and what characters eat and wear, it's all fantastically accurate.
He wrote about 20 books before he passed away. They're ridiculously easy to read so they only drawback of his books is that you'll fly through them all at nearly the rate of a book a day, because you'll not put the book down all day long. Read any of them, I recommend starting with Legend or Sword in the Storm.