The safety position is one of the most underrated positions in football. A good safety can set the tone for the entire defense through leadership, while also contributing in stopping both the run and the pass.
The leadership and importance of the safety position is evident in this fact: nine of the 10 safeties in my top 10 this year have played on at least one playoff team in the last two seasons. Granted, safeties are not quarterbacks or even left tackles in terms of importance to a football organization, but they can (and often do) set the tone for a defense.