I'll address each position you mentioned...
Tight End - One of the few holes I believe they have. However, I don't think Ebron is worth the #9 overall pick, especially since you can get a quality tight end like ASJ, Amaro or Niklas in the 2nd round.
Offensive Tackle - Maybe. Cordy Glenn is already a top-10 LT in the league and I only think he is going to get better. We could obviously use an upgrade at RT, but you can get one in the later rounds. Marrone is supposedly an offensive line-guru. If we believe this to be true, then he should be able to make a solid starter out of a mid-round pick.
Linebacker - We already have Alonso, Spikes, Bradham and Manny Lawson. I wouldn't consider the position a major need.
Defensive Tackle - Kyle Williams, Dareus, Allen Branch, Corbin Bryant. Not a hole at all.
Quarterback - Ask me after the season. EJ showed enough under very difficult circumstances with injuries, lack of practice time, etc. that I don't think you can consider the position a true need until you see a full (hopefully) season this year.