At least statistically, that's not a long list for the Eagles. What they have mostly chosen to do is put the outside linebackers near the line of scrimmage, so the quarterback is really looking at a 5-2 formation. Then, depending on the call, the linebackers either drop into coverage, stay put to man the outside lanes, or go after the quarterback. The Eagles don't like to steal from the defensive backfield or bring the safeties too close to the ball, and they don't like to make the inside linebackers do much more than react and mind their two running gaps.