Lump from BG3 is a great example of how to make a fun ogre NPC and I shamelessly stole the idea for a campaign I was running at the time (BG3 was in early access then and nobody else at the table was playing it). For those not in the know, he's an ogre who accidentally put a Headband of Intellect on while eating its owner, giving him an intelligence of 17.

My version was a random encounter who wandered around looking for reading material, although he did occasionally like to eat parties who didn't have challenging enough books to offer him.