I am pretty sure that Harvard, Princeton, and MIT do not consider your need when deciding whether to accept you. For international students I am pretty sure that Stanford does consider your need when deciding whether to accept you. I am not sure about the other two schools on your list.
Regardless, you are a very strong applicant, and all of these schools are reaches. I think that they are worth an application, but I think that it is more likely that you will not get an acceptance. If you get one, that would be doing very well.
One other possibility is to get your high school to nominate you for the Lester B Pearson scholarship at the University of Toronto. Of course you would also need to apply. Admissions would be likely, but it will only be affordable if you get the scholarship, which might be about equally competitive compared to the six universities already on your list.