How do you make a “good” defense?
Its simple: Defensive-Linemen
The front four guys make or break a defense.
If you can get pressure on a QB with just four men, more guys can drop into the secondary.
For example, the NY Giants just might have be the best front four with Justin Tuck, Jason Pierre-Paul, Chris Canty, and Osi Umenyiora. Last week they shut down the Falcons offense.
Pressure on the QB is key and these guys can do it.