Okay but imagine and James and Lily didn’t die, and the Potter’s live their life fairly happily, and Harry still defeats Voldemort in the Second Wizarding War some way or another. But James Potter is sick of fighting wars that could’ve been stopped long before innocent people had to die, and despite everyone swearing that immature and always-joking James Potter would never become a Ministry worker, he takes up a career in politics.
James becomes an unstoppable force of nature in the Wizengamot and the Ministry, he champions for muggleborn and werewolf rights, he implements a fair functional trial system, and helps to eradicate ancient laws and regulations that discriminate.
He becomes known for being something other than the father of the Boy-Who-Lived and First and Second Wizarding War veteran. His policies are renowned and he strides (no longer struts) down the halls of the Ministry, robes dramatically sweping behind him, greying temples and Dumbledore-style twinkling eyes.