Mario Benedetti
Mario Benedetti was (it is past tense because he is dead) one of the most renowned writers in Spanish from in the 20th century. (Mario Benedetti was one of the most renowned Spanish language writers in the 20th century).
He was from Uruguay but due to political problems in his home country in the 1970's he went into exile, living parts of his life in between Cuba and Spain. He has a very large body of work, where we can find consisting of novels, tales, poetry and essays but he is most famous for his poems.
Why are his poems so famous? I think he is able to make you understand what he was thinking while he was writing them and you can empathise easily with him, understanding what he was feeling and sometimes feeling in the same way.
Also, I like his metaphors and analogies.
In short, I recommend this nice excellent author to everyone.