I feel like the biggest issue with this list is that there's no consistency as to the selection criteria. Basically it seems to break down to like:
1) General Western Literature canon that you might read in school/uni.
2) Steven King specifically for no apparent reason.
3) Shakespeare specifically (for more obvious reasons).
4) A couple of random airlifted genre novels. Like, I love The Hunger Games, but what is it doing here? It is not yet part of the Western Canon, it's not usually regarded as "literature". Is Snow a better villain than many of these? Sure but why is he here and not say Dudley Smith from James Ellroy's LA books? If anything they're more part of "literature" and Smith both a more menacing/oppressive and complete character.
5) Two joke entries which essentially just acted as gimmies for the other character in the bracket.
I think if we take a very honest appraisal of this list, it's like, informed by literature, but really heavily influenced by Hollywood - a lot of these characters wouldn't even be in consideration if it wasn't for Hollywood portrayals of them - and that's really why Snow is there too (doesn't really explain why Dudley Smith isn't, but...).