“the look on Tyrion’s face”
Yes, and Jaime’s as well.
Both Tyrion & Jaime are essentially moral men - who are not interested in causing suffering. Either one of them would make a fine ruler.
And speaking of the Dothracki - what pastime will these warriors be left to pursue if peace is achieved in the Seven Kingdoms?
Hmm. Dunno. "Essentially" is a rather broad term. Especially considering that Jaime impregnated his sister at least twice...tossed an innocent child out of a 4-5 story window and Tyrion killed his father whilst Dad was taking a dump. And this after staying drunk for almost 3/4 of every day and screwing any whore who would have him.
I think the best you could say is they have a modicum of scruples when it comes to human suffering. But moral? Nah.