Switzerland, perhaps 🤔

But yes, the U.K. is the birth of democracy, we invented it (at least in its modern form), so the UK.

Our original definition is a democracy by election, i.e. we are free to choose from a limited pool a representative, but once elected, they have at least 4 years of freedom to make their own choices. If we disagree with them, we are free to un-elect them after 4 years.

The problems come from consolidation and consensus of power, if all candidates broadly share the same views and you are not offered genuine free choice, this entropy's this type of democracy.

This is where Switzerland has the edge with its true democracy, enabling the electorate not only to vote their representatives, but also vote on the laws that are made.

The limit of the Swiss system is the potential lack of representatives to propose the laws the electorate would want to vote.

Perhaps the question you wanted to ask was "Have you ever seen an perfect democratic government?"