Hello,
While there are many strengths in your profile, I’d consider HBS and Stanford very high reaches, perhaps outside the “reasonable” range. (In part because of your
over-represented profile – effectively halving the overall acceptance rates). Your competitiveness depends in part on certain specifics and details. For example, is your work track record outstanding in terms of impact and leadership? Also, you clearly have taken on leadership in the extracurricular realm; can you cite meaningful and/or impressive impacts and outcomes from your efforts? Finally,
your goals need more specificity and vision to engage the adcom, even though they are logical on the surface.
Regarding the MOOC – you can still mention it in your application, even if you haven’t completed it.
Also, I suggest not emphasizing MENSA – the adcoms focus on what you DO with whatever smarts you have.
As for schools, I’d suggest applying to either HBS or Stanford as a very high reach, and to the other programs as appropriate reasonable reaches. And be sure to address the points in the first paragraph above in you applications.