Alexander the Great!

Over the span of a decade, he led around 40,000 soldiers on a campaign that left an indelible mark on the world, shaping its course for centuries, if not eternity.

I think this documentary captures it pretty well.
https://youtu.be/K7lb6KWBanI?si=1E9OOBuerseuuEjI 

 Redditors: He was an asshole.

/Yeah, tell me about one ‘conqueror’ who was just, benevolent, and kind except to his peoples.