Germany and France have something similar to what the ACA was intended to become.  They have a national health insurance program where citizens are required to have coverage.  One big difference is the regulation of the industry to keep costs down.  I don't know how you would get medical professionals here to agree to controls on their income because one of the ways that they have lower costs is to not pay their doctors, nurses, etc. anywhere near as much as they make here in the US.