You don't necessarily have to reach - trading down to get more picks is a good move this year. We are a 3-9 team with an older roster with major holes @ QB, Oline, DB and LB. Personally I think a lot of the successful teams you mentioned are good because they pay attention to their lines. The Ravens have drafted Olineman with their 1st pick many times.
That being said I could live with Okung & Devine, but the Skins have to draft at least 2 Olineman this year to realistically address the position.