I'd say a LT, RB (or "pulling" LG) and DT/NT and perhaps a SS or strong-side LB are more important, or at the very least, as important, as the QB.
Without pass protection and a running game, its easy to defend against a team with "skilled" players in the passing game.
The Jeff George trade is the perfect example - what did the Colts give up? Chris Hinton and Andre Rison. Jeff may have had a rocket arm but the Colts were a better team with Trudeau handing the ball to Dickerson, being protected by Hinton, and passing to Rison.