Who would be on it?
>>92625391
Are the Justice League not vigilantes already?
>>92625391
Vigilante.
>>92625706
Vigilante.
>>92625742
Vigilante.
>>92625762
And Vigilante.
>>92625450
With the exception of Batman, I wouldn't consider the core League members vigilantes. Green Lantern is basically a space cop, Wonder and Supes tend to fight more giant monsters and metahumans than anything else (and as such are usually given the green light to help out however they please), and Flash /is/ a cop, even if the public at large doesn't know it.
If we ignore universes and continuity and all that shit, as well as whether or not these characters would even be willing to work together, and try to avoid characters that are just lame or have superpowers:
The Punisher
Microchip
Shotgun
Foolkiller
Lynn Michaels
Rapido
Payback
Desmond Kline
Outlaw
Hitman (Marvel)
Yuppunisher
Wild Dog
Vigilante
Jennifer Blood
Casey Jones
Mr. A
If you want to include characters of questionable quality/possible lameness, then there's also these:
The Elite
Mr. Payback
The Holy
Americop
Rorschach
>>92627081
>Mr. A
Did Ditko's The Question kill people?
>>92626047
Isn't he forensics?
>>92625391
Well this guy also moon knight
Punisher 2099
The Spider
The Prowler
Silver Sable, unless she's too lame.