I searched TRP movies and only found a couple of threads, mainly recommending this movie and a few others I've already seen.

This scene, to me at least, exemplifies holding frame. As I was watching, I kept imagining what my response would be to every sentence the girls did and then he'd answer with a super-calm smooth line I'd have never thought of in time. Try pausing after every sentence and think of the best answer.

From "Vicky Cristina Barcelona": https://www.youtube.com/watch?v=HN_237kUaXM

I've always been the goofy guy who makes the group laugh, sometimes doing funny imitations or self-deprecating jokes. Since swallowing the pill though, I've been toning that down into calmer witty jokes, with considerable success. No fidgeting, controlled movements, colder delivery, that kind of stuff. But that guy's just another world. Totally sexual male, no witty banter necessary. I don't think I'll ever get to that level of sexuality (or maybe I don't want to) but it's inspiring to see such a cold rock figure.

TL;DR: Do you know any other books or movies that have inspiringly perfect TRP characters?