Biggest need other than Quarterback (merged)

I’m only going to say whatever position we chose it should be a day one starter. So looking at the positions that we could put in a day one starter that we would not lose out on for the season like a penning. Getting a productive pick will be the key. Can they unseat Olave, kammara, or Juwan? What’s the position that fails the most? Offensive line? Defensive line? Or Linebackers?
I will be ok with whoever they chose I just do not want a reach or a project or an injury plagued player.
I want to add that I really would like our pick to be the number one rated at his position so if we don’t get Ward I do not want a QB.