In Cotton Wood Cove, You have to kill Benny. Darn, But you have to. You can free him but you'd have to kill every legionary in the camp. Once you kill Benny and take the platinum chip, Caesar makes you go down to Mr.House's bunker. You can unleash Mr.House's biggest weapon, You could use it for Yes Man, And final for the Legion. I say, The best ending you'd have to go with is Yes Man. But, No matter what you do.. Raul is never happy. :(