Compiling good plays from our DL, there are actually quite a lot.
In the meanwhile, here is a random example of how bad LB play can make your DBs look bad.
You watch this live and go "uh Fuller is playing too soft!". But he has the deep, it's a matter of our LBs, here Holcomb, not taking enough depth, and opening the window for the throw. From the endzone view you see it's a matter of a few inches, so a few yards up the field and it's a way more difficult throw to make.