I took the very unscientific approach of using Wikipedia and their List of biographical films. I then put all the information into a spreadsheet, removed a lot of annoying merged cells and came up with a list and turned this into a hopefully pretty graph:
Using this, and ignoring non 20th/21st century people, it looks like Adolf Hitler and Albert Schweitzer ...
This is a point of great contention, with different sites grading different profanities to different levels of 'swearyness'...
Back in 2009 The Magazine TOTALFILM claimed that Casino held the title with 398 F-Bombs, at a rate of 2.23 per minute. This was apparently enough to make it into the Guiness Book of records.
Since then however, certain films have ...
There are literally dozens of movies about Wong Fei-hung, who died in 1924 and therefore qualifies for your time range. Granted, most of those movies aren't well-known outside China / Hong Kong.
And you might want to make a very close inspection before declaring that e.g. Iron Monkey (1993) is a "biographical" account of his childhood! So not all of them ...
It depends on how you define it, as you can look at something like Hitchock's Psycho, which was remade almost scene for scene and shot for shot, or adaptations of works. You can also limit it by Hollywood, Bollywood, German, etc.
The Great Gatsby has been made into a film seven different times in the US, but the overall record holder for a same name film is ...
Jason Voorhees the serial killer from series of Friday The 13th movies seems to fit the bill here. With a total of 12/13 villain movies stretching from 1981 to the present and having believed to have killed in excess of 300 victims, he is the most successful serial killer of all, in the movies!
Edit: This is a new answer.
It is Savdhaan India. The total number of episodes is 1687 (as of 12th June 2016).
Savdhaan India - India Fights Back (English: Caution India! - India Fights Back) is a Hindi-language crime show. It focuses on real-life crime incidents in India and the story of struggle of the victims in order to get justice for their ...
My money is on Romeo and Juliet. But without proper in depth research, my money maybe ill-placed.
Wikipedia list of Romeo and Juliet Films
Wikipedia: Romeo and Juliet on Screen ("...may be one of the most-screened plays of all time")
SWEARNET : The Movie, the movie by the guys who "are" The Trailer Park Boys, has 935 F-bombs. According to Wikipedia:
The Guinness World Records website lists the film as holding the record for the most expletives in a film, with a total of 935 of them.
It also helps to realize that while The Wolf of Wall Street was 3 hours long, SWEARNET was only 112 ...
On the show Criminal Minds, the most prolific killer they encountered was Frank Breitkopf in S02E13 and S02E24. He had amassed 176 kills by the time he was caught.
I would assume that he fits the description of a serial killer quite well by whichever definition used, as he kills victims of a specific demographic in a specific repeated manner with long time ...
America's Most Wanted ran for 1,186 episodes and often featured more than one crime.
The show profiled cases involving the search for and apprehension of
fugitives wanted for serious crimes, including murder, rape,
kidnapping, child molestation, white-collar crime, organized crime,
armed robbery, gang violence, and terrorism, and also many of whom ...
I found a few things on the net about this.
Last of the Summer Wine is currently the most repeated show of since the beginning of 2013 in the UK (483 episodes shown).
The rest of the list is as follows:
My Family - 233 repeats
QI - One of only two current shows on list 179 times
Only Fools and Horses - Classic repeated 161 times
The Good Life - ...
Here is a link to Wikipedia's list of movies and TV shows featuring Robin Hood.
I think that there are fewer than 50 theatrical movies on the list.
I have often read that Sherlock Holmes is the most often filmed character.
It has been estimated that Sherlock Holmes is the most prolific screen character in the history of cinema.
If the answer sought is for fictional treatments of real cases, then "Dragnet". Every episode was based on a real case "names changed to protect the innocent". There were 276 episodes of Dragnet on TV; the same or a few more on radio. Some of the same stories were used on radio and TV.