McGill, UC Berkeley, UChicago, Columbia, Brown, Boston College, and the rest are pretty much the same level easiness. The schools I listed are in order from most difficult for you to least. McGill is entirely, and really I mean entirely, focused on academic grades/standardized tests. UC Berkeley is focused on grades as well tremendously, but may excuse you.
With the comments that your teachers have shared about you, you probably have some sort of special gift that may make a difference in the future. Remember, a lot of people who did were not excellent students when it comes to grades. The love of learning and ability to grow intellectually is what matters most and I think if this is shown through recs, which count a lot, then you have a great chance of getting in. I see you are trying to work on you perfectionism as well. This may slightly bring you down in other matters of college. (Also, you don't have to be a grade grubber to be an A student :-)). Get your counselor to mention what you just mentioned here.
I think you stand a great chance. Show your abilities through ECs. What ECs are you involved with? What about standardized tests?