(My character is a pacifist, but Codsworth is not.)
How would you be clearing the 'kill all the people in this building' quests or even the Museum part getting to Gravy in the first place. Letting Codsworth do
all of it? I imagine you'd be doing it in a roundabout way by waiting and waiting as Codsworth AI does the killing, while also it getting knocked down from being ganged up on, then wait until it auto-heals (since immortal) and so forth. Also that wouldn't make your character a real pacifist, more like an accessory.
Hey, he's just my butler. I can't be held responsible for what he does on his time off. Oops, I dropped one of my landmines. Oh dear, I hope no one steps on that. Hey everyone I'm doing some target practice with my gun in this hallway, okay? Nobody enter this hallway while I'm practicing!
So maybe not 100% pacifist, but I'm certainly trying. I prefer using the Intimidation perk to tell raiders to stop dead, rather than shooting them. I also have the Ricochet perk, it's hilarious when it procs. And no perks in any of the combat skills, only Luck and Charisma ones. Most of those quests though, I tend to just avoid. In the one with the Deathclaw I simply jumped off the roof, exited the power armor and ran away. I'm going to return when I have the perk that lets you give wasteland creatures commands, and tell it to go attack that huge sentry robot up near the USAF Olivia satellite dish, the one you activate by holotape. It has two miniguns, so maybe it'll take care of things.
As for Codsworth, he wipes the floor with everything I come across, except the Deathclaw. It seems that the "player takes extra damage" modifier from the Survival difficulty setting doesn't apply to him, but the "enemies do more damage" modifier
does. He also has an obscene amount of HP. You know Ack-Ack, in the USAF Olivia, the raider with the minigun? He killed her. Didn't even make him flinch. He's even more powerful with the perk that makes followers do more damage.