And when doing db rows try and use a dead stop (rest the DB on the floor for half a sec between reps) and focus on letting the lay stretch out at the bottom. To many people ignore the importance of getting a good stretch, esp on back movements. It's almost as important as getting a good contraction at the peak.
Also, deadlifts. Simply lifting heavy weight (which deads should allow, accepting that "heavy" is relative but will be a lot more than you're currently using for db rows and pull downs) with engaged lats will put some meat on them.
And all the movements I listed above.