Here's a list of ten notorious mafia figures or groups from different regions and time periods, presented in no particular order:

1.Al Capone (Chicago Outfit):

A prominent American gangster during Prohibition, Capone led the Chicago Outfit and was involved in various criminal activities, making him one of the most infamous figures in American organized crime.

2.Salvatore "Toto" Riina (Sicilian Mafia):

Riina, also known as "The Beast," was a powerful boss of the Sicilian Mafia (Cosa Nostra). He orchestrated high-profile assassinations and played a key role in the Mafia's activities in the 20th century.

3.John Gotti (Gambino Crime Family):

Gotti was a high-profile boss of the Gambino Crime Family in New York. His flamboyant personality and involvement in high-profile crimes earned him the nickname "The Teflon Don."

4.Pablo Escobar (Medellín Cartel):

Although not part of the traditional Mafia, Escobar was a Colombian drug lord who dominated the cocaine trade and was known for his brutal tactics and vast criminal empire.

5.Vito Genovese (Genovese Crime Family):

A powerful figure in the American Mafia, Genovese played a significant role in the formation of the modern Mafia structure and was involved in various criminal activities.

6.Meyer Lansky:

Often considered the financial brains behind the American Mafia, Lansky was involved in organized crime and played a key role in the development of the National Crime Syndicate.

7.Joachim Messner (South Tyrolean Mafia):

Messner was a key figure in the South Tyrolean Mafia, an organized crime syndicate operating in northern Italy. He was involved in various criminal activities, including extortion and racketeering.

8.The Kray Twins (East End of London):

Reginald and Ronald Kray were notorious British criminals who led a gang known as "The Firm." They were involved in various criminal activities, including racketeering and organized violence.

9.Giovanni Falcone and Paolo Borsellino (Italian Anti-Mafia Prosecutors):

While not part of the Mafia, these Italian prosecutors played crucial roles in challenging and prosecuting the Mafia, leading to the Maxi Trial in the 1980s.

10.Dawood Ibrahim (D-Company):

A prominent figure in the Indian organized crime scene, Ibrahim leads the D-Company, involved in various criminal activities, including drug trafficking and organized violence.

It's important to note that these figures and groups operated in different contexts, and the impact of their criminal activities varied. Additionally, opinions on the "top" mafia figures may differ based on individual perspectives and criteria for evaluation.