Cornerback - Charles Woodson - Age has refused to slow his production down, even now. The guy can play the zone or man-to-man as well as anyone in the league and is always ready to turn a mistake into 6 points.
Safety - Rod Woodson, his numbers speak for themselves. If you were a receiver coming over the middle then no matter what, you knew Rod was coming for you.
Defensive Tackle - Reggie White, teams constantly built their offensive lines around stopping him come gameday. 199 sacks later... they failed. The guy had such a legendary motor and was always a class act.
Defensive End - Bruce Smith, if there was anyone who was ever truly unstoppable... it was Smith. Currently holds the sack record that only the previously mentioned Reggie White had a chance of claiming.
Linebacker - As much as I wanted to say Ray Lewis.... I have to go with Lawrence Taylor. The original LT was an absolute monster on the field and made everything look so easy, rarely ever missed a tackle.