I recently realized that so far there have been 4 movies about Steve Jobs' life, however ridiculous that might be, it made me wonder if there was another person that has enjoyed the same amount of interest or greater, I think for the sake of brevity we should exclude figures that weren't around the 20th and 21st century. I'm interested in recent public figures.
So to summarize the question: What's the record for highest number of biographies on a single person?