While school rank/prestige is taken into consideration in residency selection (Maybe a little more after Step 1 went p/f), there's so much more that makes a competitive applicant.....letters of rec.(HUGE), test scores, research, AOA, how well you do on aways, mentors that are well connected people in the field, clerkship grades, etc.
Build a well-rounded application and you won't have to worry about the school's prestige/ranking.