I will be quite unhappy if Tinku doesn't appear on at least one of the best artists lists. He is originally from Guatemala, and has shared public art both there and in El Salvador. It is my understanding that he spends half the year in Mexico City with his father (a professional photographer), and the other half of the year in Buenos Aires. Although many people I know dislike labels, I think Tinku would best be categorized as a Central American artist.
So, Daniel, can you please find a place for him on one of your lists? Tinku is certainly deserving. Although he is very young and not well known (yet), he won this year's Stencil Art Prize in Australia, and has been recognized as one of the world's most gifted stencil artists.