Thoughts on playing a True Neutral NPC (yeah, yeah, I know it's been discussed before)

Hey folks,

So I think I have a cool idea for an NPC. I want to play a TN Tiefling, Lorekeeper of Oghma. My thinking? Well, Tiefling because, after all he is a child of Bhaal and, Lorekeeper of Oghma because that's the Temple in Candlekeep, so it makes sense that he'd have been introduced to that pantheon most of all. Of course the library would open up all of the others but, "Hey, this is what I settled on."

But...

The Lorekeeper of Oghma requires TN alignment. I'm cool with that and can surround myself with TN, LN, CN, NG and NE NPCs and that should help guide my actions but I'm looking for other ideas on how to play this dude successfully. I am anal about realism in my playthroughs.

Thinking about a no-reload effort as a diversion from my masters studies.

Any thoughts are appreciated. CT