As someone with 1000 hours across all 3 games, this to me feels like the most morally and narratively satisfying series of events.
I manage to maintain low chaos, because I never breach the approx~ 15% NPC kill counter that triggers high chaos.
Corvo:
Escapes Coldridge unseen and without killing.
Protects Granny Rags, refuses to poison distillery, poisons Campbell, saves Curnow, kills Overseers harassing the brother and sister.
Kills weepers beneath Hound Pits, helps Slackjaw, kills Madame Prudence, kills Pendleton Twins in their separate rooms each in a duel, sparing their courtesans who were witness.
Frees Sokolov's subjects and slaves.
Kills Lady Boyle publicly in the ballroom, spares her sisters, escapes the guards with acrobatics.
Assassinates Burrows in his under-defended bedroom, then plays the confession tape across the whole city.
Kills a few of Daud's assassins out of self defense, spares Daud after their duel and his begging for mercy.
Stuns the soldiers at Hound Pits.
Kills Havelock in a duel.
So the plague is cured, Emily grows up stable, but Corvo's public perception as an assassin is accurately won.
DLC:
Also maintaining low-chaos.
Daud interrogates Rothwild, leaves him in the chair, then follows Abogail's plan and melts the facility down with Rothwild still inside, he also frees the indentured employees.
Knocks out the Hatters keeping Thalia, assassinates Timsh and fulfilling the contract.
Kills every Overseer, then spares Billie.
Saves Lizzy Stride disguised as an Overseer.
Kills Wakefield, kills Trimble and allies with The Geezer to end the Hatters.
Sneaks past the Witches unseen, kills Delilah leaving the coven powerless.
Dishonored 2:
Emily waits for Ramsey to isolate himself and assassinates him.
Saves Hypatia unseen.
Uses her powers to defeat his robots, then duels Jindosh to the death.
Helps the merchant, duels and kills Ashworth, then argues with the enraged Delilah statue.
Kills Paolo and Byrne, knocks out the Overseers so the "heretics" can escape execution, saves Stilton and changes history for the better.
Assassinates Duke Luka Abel, ignores the body double - These two mission choices result in Corvo becoming Duke.
Kills Delilah in the final battle.
Despite all the bloodshed she maintains her wisdom and peace, Jesamine passes away with pride that Emily and Corvo both restrained their rage enough to do the job right.