Cordwainer Smith aka Paul Myron Anthony Linebarger has quickly become one of my favorite SF authors of all time. I am currently reading his "best of" collection now.
Cordwainer mostly wrote short stories and only one complete novel (Nostrilia) that was an expanded version of previously written stories. However, his contributions to the realm of SF are nothing but rich.
He died in 1966 and his works have still withstood the test of time in my opinion with the expansiveness and interconncetedness of his stories largely focusing on the Instrumentality of Mankind - or man's attempts to interact with space.
He also led a very interesting life having a PhD in poly sci and working in espionage and mind control/psychological warfare for the US gov. I think he is extremely underappreciated in the modern SF community.
Let's look at some of the beautiful covers to his excellent works now: