The NFL is trying to kill defense, and of course QB is the #1 position, but try to tell me there is any CB, EDGE... whatever the hell that is, DT, OT, WR(Maybe Jerry Rice excepted, maybe), Safety, TE, Guard or Punter, who changes the game for an entire team the way a truly dominant MLB does.
LB's are the football players out there- the men amongst boys, if you will. They keep the prima donnas in check, the DT's in check. MLB's aren't the answer to everything on defense, but they're the ones I want setting the tone.
Outside of great roles played by great players, Bruce, Deion, Reggie, the truly intimidating defenses have been anchored by the linebackers.
Try it in your head without looking... list the great DL, LB's and DB's, then write them down. $42.76 on the LB's.