Well, as it’s not clear of the timeline this post refers when talking about classic, I’m going to risk it and post mine:
Eça de Queirós
http://en.wikipedia.org/wiki/José_Maria_Eça_de_Queiroz
http://www.gutenberg.org/browse/authors/q#a4852
I apologize as it’s a fellow Portuguese, but I think he is amazing.
Best,