The popularity of people can ben measured by search queries in Google.trends and the popularity in international media by marshallindex which is measuring how often the name is mentioned in media.In this way you can find out who was most the most famous band at what time, I prefer marshallindex over trends because media has still more impact for celebrities then search.
Europe's most famous author may have been William Shakespeare.
the most famous author well African American author in the world is Walter Mosey...he is "the most famous black male writer in America" that is what people in America call him. I think Wilbur Smith the most African American author is...... Walter mosey
Enid Blyton
William Wordworth.
He was an author, his most famous creation being Winnie the pooh
Yann Martel is a famous author. His most famous novel is Life of Pi.
Stephenie Meyer Is the author of twilight
At the moment, it's Haruki Murakami (worldwide most famous, but also in Japan)
Arguably either Goethe (Guh-tah) or Schiller.
Johann Goethe
Working as an author is a super career
Shel Silverstein