A companion to the other thread
Although i guess the most underrated writers are not even largely known, i think we can discuss some which are a bit known, but not nearly as much as we think they deserve to be.
I would like to nominate Constantine Cavafy. He is rapidly becomming more and more famous, but i think he deserves a spot in the pantheon of best poets of recent aeons.
Nerval is a bit on the periphery of letters these days too.