Science says there has always been a few Metahumans in the world.  Some use their powers for good, other for evil.  Some use those powers outside the law.  These are the vigilantes.  Here are a few.

United States
Black Leopard: former vigilante from Cleveland.
The Bronx Bomber: battling the New York City Mobs.
Giza Chui: defending the underprivilaged of Cleveland.
Hot Shot: champion of Detroit.
Northstar: hunting small time criminals in Minneapolis/St. Paul.
Reaper: avenger. His target?  The Chicago underworld.

Asia
Pokholodaniye: anti-Chinese Russian

Europe
Blood Witch: avenger of Croatia.
The Demon Bear: denizen of the Pyrenees

Africa
Eviter: Kinshasa street kid grown up