Remathilis said:My problem is on "how much" corruption a LG church could have...
In some D&D worlds, I can't see there being that much corruption. Detect Evil...
Corruption != Evil. Not necessarily, anyway. If someone is acting in what they believe to be a manner that works on behalf of the greater good, and never commits an outright 'evil' act, then Detect Evil is not going to touch them. I could go on about this for some time, but I hope you get the gist.
Also, someone has got to do the evil detection, and that's what the Church Inquisitors are for. I mean, just look at those class features.
However, unless you're playing an RP heavy or political compaign, or the like, Inquisitor is an NPC class.