Off the top of my head with absolutely no research the B1G historically stacks up as follows: IU, MSU, OSU/IL, Mich, Iowa, Purdue, Wisconsin, Minnesota, everyone else. There's a clear tier one with IU/MSU, arguments can be made between OSU, IL, and Michigan, and then you've got tier three. Trying to convince yourself Purdue is the best historical program in the Big Ten is total hogwash.