Robert Neyland
Neyland is often referred to as one of the best, if not the best, defensive football coaches ever.  Sports Illustrated named Neyland as the defensive coordinator of its all-century college football team in its "Best of the 20th Century" edition.  In 112 of his wins, the other team did not score a point. In 1938 and 1939, Neyland's team set NCAA records when they did not allow a point in 17 straight games. His 1939 team is the last NCAA team in history to hold every regular season opponent scoreless.