I never heard of colleges having class rankings. All a college “class” consists of is the students who start as freshmen the same fall term. Unlike HS there will not be uniform classes taken- even in the same subject. Students may get credits for HS work (AP exams) and take more/less credits in any given semester. They will take vastly different courses in the pursuit of different majors, unlike the standard HS courses for graduation.
Too many variables. It just doesn’t matter. You don’t want the A chemistry student trying to teach English or the top education major doing your engineering project.