Schemes are built back to front these days, defenses want to limit explosive pass plays first and fit the run second. It’s one reason teams love nickel, they would rather a 7th guy in coverage versus a 5th guy on the LOS.
I would agree with picking a DC with a DB background to make sure we are designing and teaching sound coverage schemes. Stopping the run will come down to getting better talent on the field, if we have to commit extra resources to the run then we’re just asking to get crushed by the big play.