Off the top of my head I’d suggest the top heavyweights in the political development/ history of the west for good or for ill would be Cyrus, Alexander, Augustus, Constantine, Charlemagne, Locke/Montesque, Marx, and Hitler. Other nominees?
Churchill.
no founding fathers or adam smith...
Marx would be little remembered without the opportunist Lenin.
Washington is often taken for granted but Lord was he pivotal.
For various reasons I would add Augustine and then Erasmus/Luther combined.
...Johannes Gutenberg. While not a political animal himself (that I'm aware of), the impact of his printing press in post-Renaissance politics is immeasurable. Sort of like the internet, it allowed for the proliferation and projection of thoughts and ideas in a manner that was wholly unprecedented at the time.