On Defense,
On defense you want some of the meanist hardest hitting Moby Joby's there ever was:

Nose Tackle: Vlad"The Impaler"
DT: Joseph Stalin "Go Red"
DT:Benito"El Duce" Musilini "Go on two"
DE:Gangus Kahn
DE:Attilah "The Hun"
LB: Gen. George C. Patten "Old Iron Pants"
LB: Gen Douglass MacArthur "Old blood & Guts"
MLB: Niketa (ck.sp) Krueshev
SS: Adolph Hitler "We will never forget"
FS: Paul Pot " The Killing fields"

These are the greatest vilians/field generals that I could think of at this time. Each one of these individuals has shaped world history like no other. In my mind I would use them as ahard core defense that only the best offensive juggarnaught could stop! Otherwise you would tremble before the scourage!
PS, Patton & Mcarthur were chosen for their aggressiveness!