The US is not a democracy. This is a fallacy that many fail to realize. While we have and value democratic principles, we are a federal republic. For example, if we were a democracy, there would be no Electoral College. The vote for president would be by popular vote.
Switzerland is a country governed by what is known as a direct democracy, where the people hold more power than the representatives they elect. It doesn’t get any better than that if you are looking at a nation that does democracy really better than almost anyone else, including the US.