Australia? Canada? Denmark? New Zealand? Norway? Switzerland? Etcetera. And before you leap up, I do know there is no "perfect" government, not by a long shot, but that is _not_ an excuse to pretend "ours is better", let alone your audacity of "ours is best". Don't pull that crap on me, I'm not that gullible. If a country isn't objectively looking at other countries to adapt what their governments are doing better to improve the quality of life for their citizens, that country is in serious trouble.
Electoral: the US uses first past the post rather than preferential voting, despite the latter being mathematically proven to be less flawed. The US also insists on using easily-hacked electromechanical and proxy voting methods despite the proven scalability and reliability of manual systems used by other countries.
Legislative: it appears to be legal (or any law against it is toothless) for US Congress members to vote on a bill without reading it first. For example, it is suspected that zero members of Congress actually read the final text of the Patriot Act before voting on it.
Medical: the US healthcare system is a mess, with a much poorer safety net than is provided in many other Western and Nordic countries.
Military: the US has a long history of testing biological, chemical and nuclear weapons on its own people without their consent, of overthrowing democratically elected foreign governments, of providing military assistance to despotic countries despite knowing that those countries were actively engaged in using chemical weapons against civilian and military targets, and has even recently relied on policies of extraterritorial kidnapping, torture of prisoners, rules of engagement allowing the use of lethal force against unconfirmed targets (e.g. drone strikes on civilians), mass warrantless surveillance, and the public denial of these activities, even to the extent of lying to Congress while under oath.
Prison: the US reserved the power of slavery to the government, then commercialised its prisons for profit. Other countries simply outlawed slavery, period.
I could go on, but I'm getting too angry at the sheer hypocrisy of the behaviour I'm summarising for you.