Best path into the United States?

If you are not a US citizen, it is very very difficult to apply and be accepted into Medical school here. Here is a link to get you started.

Getting into Harvard/Stanford can be equated to a lottery and that is for US applicants. It is even more difficult as an International so you do have your work cut out for you.

http://www.usnews.com/education/blogs/medical-school-admissions-doctor/2012/07/16/3-tips-for-international-students-applying-to-us-medical-schools

http://www.kevinmd.com/blog/2015/04/the-match-2015-a-grim-prognosis-for-international-medical-graduates.html

http://www.biology.howard.edu/undergraduate.careers/international.MD.programs.pdf