Rivals did a nice little feature on the top prospect to sign with each Big 12 school...during the Rivals era. Try to do as I do and ignore the "ever" reference in the headline. "Ever" didn't start when Rivals started, we all know that.
https://n.rivals.com/news/inside-look-at-top-recruit-ever-for-each-big-12-school
https://n.rivals.com/news/inside-look-at-top-recruit-ever-for-each-big-12-school