Bring on the Bad Guys: Jack O'Leary

Real name: Jack O'Leary

A.K.A.: 

First Appearance: Action Comics I#16 (September 1939)

Abilities: Running a numbers racket

Quotes: "I've got to get away from this madman!"

Worst Act: Running numbers, gambling, and bribing officials 

Created by: Jerry Sigel (writer) and Joe Shuster/Paul Cassidy(pencils/inks)

This time out Superman tackles gambling. After rescuing a desperate man who's life was ruined by gambling, Superman decides to remove the problem. After busting up casinos and other dens of vice, Superman brings the fight to the big man himself, Jack O'Leary. 

O'Leary does the usual (shooting, throwing a pistol, etc.) but Superman scares him and the corrupt police commissioner Watson out of town.

Again, a pretty basic story by this point.