Suggestions:
Gene Wolfe. Anything. Seriously. The man's a genius, and one of the best modern Sci-Fi writers alive, and outside the writing community, few people know his work, and that's a shame. Won just about every major award there is to win, prolific, and devastatingly intelligent. When I read his Book of the New Sun series, I had to look up new words on almost every page, and I consider myself possessed of a fairly formidable vocabulary. Brilliant symbolism, metaphor, plot, sense of wonder, magic, and science.
Martha Wells: City of Bones and Death of the Necromancer. Martha's terrific, writes wonderful stories with compelling characters, fast action, witty dialogue, genuine terror, and great archaeological mystery.
Sean Stewart: Night Watch A masterful vision of the future of magic and technology, combined with ancient Chinese mythology and ghost stories. No Hollywood endings here: the "good" guys don't always win, don't always end up with their loved ones, and everyone gets scars.
There's always more ...
Warrior Poet