Oh, there are people like that in Zebra Girl's world. For a while I had a notion of introducing "Chinatown Brown," greatest monster hunter on the West Coast. It didn't work out, but Professor Broadshoulders and Jack mentioned him by name (on pages 383 and 789, respectively), so he's canon. And I assure you, he and his sidekicks are very traditionally heroic.
But monster hunters are rare, and the crux of the final storyline was that law and order would grow from within the "monster community", rather than from an imposition along the lines of traditional notions of good humans and bad monsters. That's the purpose of Zandra's "MINIONs", monsters policing the community alongside mundane law enforcement like Suze Orman.
And on that note, it's worth mentioning that Black Betty came up with the idea, ultimately becoming an agent of order rather than chaos. Pook carry themselves like wild troublemakers, but they actually have a very developed sense of justice.