If we're ranking the greatest Stanford football players of the past 50 years, three obvious names come to mind -- Bryce Love, Andrew Luck, and Christian McCaffrey. (Personally, I hedge a bit. I've got Luck as the best quarterback in program history and Love as the greatest pure running back, which allows me to choose McCaffrey as the best all-around player.)
But if we're talking about the most important players, there's a fourth name that has to be included with those three. In fact, I'd argue that along with Luck, Richard Sherman is one to the two most important players in program history.