The Malazan Book of the Fallen by Steven Erikson
The Broken Empire Trilogy by Mark Lawrence
The Powder Mage Trilogy by Brian McClellan
Raven’s Shadow Trilogy by Anthony Ryan
The Chronicles of the Black Company by Glen Cook
For those of you unaware, Grimdark refers to a sub-genre of speculative fiction that is particularly realistic or that contains an anti-hero. I find that military fantasy books often end up in this sub-genre, and these novels hold a special place in my heart. Each of the links above will take you to the Goodreads page for the first novel in each series. Enjoy!