What literary character, based on a man who was born in 1750, is referenced in the name of a foundation whose mission is “to spread Alex Haley’s vision of a world that celebrates ethnic diversity while honoring humankind’s common, universal experiences.”?

Prior to Drake in 2016 and 2018, who was the most recent artist from outside the United States or United Kingdom to have the best-selling album of the year in the U.S?