1.

Al Capone: Violent Chicago mob boss during prohibition.

2. Kray Twins: Brothers had London gripped with fear.

3. Arthur Thomson: The 'Godfather' ran Glasgow's underworld for thirty years.

4. John Dillinger: Bank robber extraordinaire.

5. Bugsy Siegel: Mobster who built Las Vegas.

6. Lucky Luciano: The founder of modern mafia.

7. Henry Hill: The original 'Goodfella'.

8. Pablo Escobar: Colombian drug lord.

9. Meyer Lansky: Founding member of Murder Inc.

10. Ned Kelly: Head of infamous Kelly gang.