I'm not sure I grasp the problem, here.  Sounds like a Warden to me!  And they're 'bad' as in bad-ass, but not Bad as in bad-guy.  A wandering Wizard who specializes in monster removal wouldn't be a bad PC, but we're not quite high octane enough for a full fledged Warden.  A Warden wanna-be, on the other hand...