Pompey

Roman general and statesman whose extraordinary military career (clearing the Mediterranean of pirates in 90 days, conquering the East) was eclipsed by Caesar — defeated at Pharsalus and assassinated in Egypt.

Pompey as the foil to Caesar: where Caesar is the more famous figure, Pompey's career is arguably the more revealing — he was the most successful Roman general of his era before Caesar emerged, pioneering the extra-constitutional powers (the command against the pirates, the eastern command) that Caesar later seized more brutally. His clearing of the Mediterranean of piracy in 67 BCE is one of the greatest military-logistical achievements in ancient history (200 ships, 90 days, 10,000 pirates killed or captured). His defeat at Pharsalus and assassination by Egyptian courtiers documents how quickly military prestige evaporates when divorced from political power.