Which defensive lineman was nicknamed "The Minister of Defense"?

Which receiver was nicknamed "Megatron"? Which running back was nicknamed "Beast Mode"? Which running back was nicknamed "The Bus"? Which linebacker was known simply as "L.T." and revolutionized the pass rush with the Giants? Which Bears defensive tackle was nicknamed "The Refrigerator"? Which Chicago Bears legend was known as "The Galloping Ghost"? Which quarterback was nicknamed "The Gunslinger"? Which tight end is known by the nickname "Gronk"?