The Black Company is the only Cook I've read. I'm on book seven now, and the series is so consistently good.
BC is my favorite kind of fantasy. Dry. Arid Desert Dry and about the people. I'd heard he was suppsed to write more BC books, but I dont know if those sill exist. His Scifi stuff is pretty excellent too.
Dragon Never Sleeps was great, I need to pick up StarFishers, its a Space Opera about Norse Mythology and Submarine like warfare.
Dread Empire was really enjoyable. Its like the precursor to epic military fantasy you can taste a lot of malazan like vibes in it. (Book 1 was in 1979)
Instrumentalities of the Night is very bizarre. Good, and very bizarre. Cook is one of the few authors that I've read that really likes to let his stories span globes and continents and that another reason I love his stuff.
Croaker is a bro.