Ditto Mordenkainen and the Circle of Eight in Greyhawk; their whole shctick is maintain the balance.Possibly. But the portrayal of the Emerald Enclave from the Vilhon Reach supplement comes to mind, although they were druids and its a little of a different case, but I that was my mindset when I made that comment.
But they're exceptions to the rule though. Generally speaking True Neutral people don't care strongly about good, evil, law or chaos, rather than caring deeply about neutrality.
Think of it as a person who does not care what team wins a sporting competition on one hand (not caring Neutrality) as opposed to a person who is dedicated to ensuring every team wins at least once, or sabotaging the competition so no team can ever win (Mordenkainen and the EE Druids).