Avraham Avinu by the akeida, “Vayashkeim” that he got up early to do Hashem’s bidding.
Pinchas Ben Elazar Hakohein, who killed Zimri Ben Salu and Cozbi bas Tzur with one stroke through both of them, for flagrant public immorality.
Tzipporah, who herself gave a bris milah to her son.
Shmuel Hanavi who killed Og Melech Habashan (do I have that right?) when Shaul Hamelech failed to do what he was commanded, to execute him. Shmuel just took a sword and split him in half.