In the first edition one at least, Batman may have had a higher bad guy to good guy ratio than most.
Batman, Batgirl, Harvey Bullock, Black Lightning,
Catwoman — Clayface II, Croc, Cat Man, Crazy Quilt,
Commissioner Gordon, Geo-Force,
Metamorpho — Mr. Freeze, Man Bat, Mad Hatter,
Nightwing, Nocturna, — Night-Slayer,
— Penguin, Poison Ivy,
Robin, Julia Remarque, — Riddler, R’as Al Ghul,
— Hugo Strange, Scarecrow,
Talia, Two Face,
There’s an extensive map of the various levels of Batman’s joint, too.