Yoda, Dumbledore, Spock, and Gandalf Compete To See Who Is The Best Dinner Party Guest
There's a dinner party with eight people. All are upper middle-class, aged between 30 and 50. Each of our champions shall join the party as the ninth guest, and upon the end of the night, the party shall be reset and the next champion shall attempt it. Therefore, they are not being compared to one-another.
At the end of the night, all the other guests score the ninth guest out of ten for how pleasant they were, how charming, how nice they were to have there.
Round 1: The champions are unaware that they are being scored, and are acting perfectly in-character.
Round 2: The champions are aware that they are being scored, and are therefore trying to be as charming as possible.
Round 3: It's a small house party, and all four of our champions are there. Although they are all still in-character, they may attempt to sabotage the other champions.