Yeah, he definitely came across as being somewhat realistic regarding his political maneuverings. However, I’d probably say if he took the government by force, he’d be a bit more realistic, like how Lenin got into power (and believe me, he was definitely as totalitarian as Stalin was).
I’d probably say Scar rivals Palpatine in that regard, though.
Not to say Palpatine’s not a well-written character, he was.