To say that you don't need a good O-line is simply untrue. However, you can use picks in rounds 3-5 to acquire depth and size on the line. I would use a first round pick if I had NOBODY or if my LT was retiring or 35 years old.
Albert's just fine. Tag him/sign him and he does great at LT.
Rounds 1-2 are for playmakers, IMO. QB, pass rushers, CB, WR.