As the title says. Hard to pick out the standouts but some of the ones I love would be Lord of the Rings- JRR Tolkien (Hard not to love it). Serpentwar Saga- Raymond E. Feist (probably the first darker one I remember reading after happier heroic fantasy). The Black Company- Glen Cook (always fun to read the story from the bad guy's perspective. especially when it's a mere henchman). The Warlord Chronicles- Bernard Cornwell (a mix of low fantasy and historical fiction but still a great read). Conan the Barbarian- REH. Monarchies of God- Paul Kearney (great dark fantasy series). There's bound to be more but that's all I can think of right now!