https://en.wikipedia.org/wiki/Nero

Nero prepared himself for suicide, [...] Losing his nerve, he begged one of his companions to set an example by killing himself first. At last, the sound of approaching horsemen drove Nero to face the end. However, he still could not bring himself to take his own life, but instead forced his private secretary, Epaphroditus, to perform the task.[98]
[...]

According to Sulpicius Severus, it is unclear whether Nero took his own life.[100]

I'm also pretty sure I saw a Bettany Hughes documentary that depicted it as the companion he asked to commit suicide as an example instead killed him in anger

drone strikes or any other US military actions don't count for "Bill or Hillary Clinton had someone whacked"