I teach English to international students who are getting ready to study at a university here in the US. Your written English is not good enough yet for the university where I work. For Stanford and the other places on your list, it would need to be even better. If you want to complete your undergraduate studies in the US, my advice would be to make a completely new list and apply for Fall 2017. If you’d just like to be here for a year, then choose a university in Spain that has exchange programs. To go to grad school in the US, graduating from a good university in your home country will be fine. You do not need to worry about which one is the most famous here.
To find better matches for yourself here in the US, get in touch with the EducationUSA advising center in Madrid. The counselors there will have useful information for you. https://educationusa.state.gov/centers/fulbright-madrid