At first glance, I think you have a legitimate shot at any of these schools, in including Stanford. However, keep in mind that Stanford GSB's acceptance rate hovers around 7-8%, so the odds for ANYONE, on average, are low! I don't tell you that to discourage you, but rather just to help yo ukeep things in perspective.
Having said that, I do think that you have a respectable shot at any of these schools. I don't see many glaring weaknesses, assuming that your GPA doesn't mask any horrors (such as your grades dropping off a cliff in your senior year in college). Assuming that you're applying this coming fall, you still have plenty of time to try to make more of a mark in your community -- showing up and "doing" Habitat for Humanity is fine, but is there a way to show how you've really led something and made a mark on your community, in a way that wouldn't have happened if you weren't there? Think about it in terms like this.
BTW, in case you haven't already, be sure to download the free Annual Reports we have on our site for Stanford, Harvard, and 13 other top schools. They're a great starting point for your research!
https://www.gmatclub.com/forum/veritas-prep-resource-links-no-longer-available-399979.html#-reports/Good luck!
Scott