I know of no such students. None. Sometimes average students are encouraged by relatives or friends to apply to Ivy League schools with claim that the schools want their student body to reflect the US or that the schools don’t just want those top students. That is not true. The Ivy League schools do only want the top students. They don’t want their student body to reflect the US and they don’t throw in a few B student to round out the student body. Others may be surprised that a given student is accepted to Ivy league level schools but that is usually because the other people don’t know about the student’s achievements. The achievements are not always classroom achievements. Brilliant musicians, olympic athletes,accomplished actors, etc…may be admitted even if their grades are not top notch. But they have accomplishment that are widely recognized and that elevate them to outstanding candidates. But a B student with a few ECs they are passionate about won’t be getting offers from Ivy League schools.
On a happier note, there are a ton of great schools that accept a wide range of students.