Here is how gifted Brooking was. Think of all the greats who we have seen wearing the white and gold. Of all of them, here are the players drafted at or lower than Keith was in the first round of the NFL draft (Keith went as the 12th pick to the ATL Falcons). Marco Coleman also went as the 12th pick to the Dolphins in '92. Before Marco you had to go back to Rufus Guthrie (#10, 1963 Rams), Larry Morris (#7, 1955, Rams) and then to Eddie Prokop (#4, Boston Yanks, 1945). After Keith of course there was CJ (#2, 2007, Lions). That's it. That's how unusually gifted he was.
I would argue that the two players who left GT as exponentially better than when they first set foot on the Flats, Keith and Kent Hill would be at the top of the list. Andrew Gardner might get some consideration here as well. The combination of great genetics and great work ethic is undefeated across all endeavors of our time here on this ball of dirt.