Greetings!
Interesting...some of my players are quite like this--they love to role-play social stuff, and combat is far lower on their list of priorities. In your case, as well as similar ones, I find that it can inspire some bloodlust by having a company of elite half-ogres attack a group of their noble friends as they ride out to some bucolic forest meadow for a party. When the players go looking for their missing noble friends, they find that some of their fine noble friends have been brutally raped, skinned alive, and crucified on a nearby hill!
That usually works.
Then the local village with the friendly Mayberry villagers?--They get the same treatment--men, women, children, young and old. They are all broken to the might of the forces of darkness!
Try it. My players then realise that play-time is over, and while it's great to make sweet-talk, they must remind themselves that they live in a vicious, brutal world that needs heroes of righteousness to stand against the forces of darkness!
Semper Fidelis,
SHARK