Here are a few of my preferred selections from Ecuadorian painter Oswaldo Guayasamin.

Absolute favorite:

I adore the way he paints hands and faces; long, lean, full of expression.

Guayasamín dedicated his life to painting, sculpting, collecting; however, he was an ardent supporter of the Cuban Revolution. He was given a prize for “an entire life of work for peace” by the United Nations Educational, Scientific and Cultural Organization. His death on March 10, 1999 was marked by a day of national strikes by the indigenous people (whom he spent his life supporting).

Some information here.