Haschwalth is the second in command of the Quincy after Yhwach, acting as his advisor and commonly being referred to as the Sternritter Grandmaster.

Source: https://gamerant.com/bleach-most-powerful-members-quincy-clan/

In the 1970s, Lucius Malfoy joined the Death Eaters and rose through the ranks to become Voldemort's second in command.

Source: https://www.cbr.com/most-powerful-magical-families-in-harry-potter/

Nirav Shah, director of Maine's Center for Disease Control and Prevention, will be second in command at the U.S. CDC starting next month.

Source: https://www.centralmaine.com/2023/02/03/dr-shah-to-attend-state-of-the-union-as-he-prepares-for-new-federal-role/