For simply making the Seahawks team better (for longer than 1 season) and not doing extensive research on the players for scheme fit the list comes down to.
Cards: Fitz, Peterson, Washington, Campbell
49ers: VD, Willis, Iupati
Rams: Long, Jenkins, Quinn, Brockers, Laurinaitis
I have a feeling Justin Smith and Willis are huge parts of what make Aldon and Bowman great so I will pass on them for this. I would want Justin the most but he's too old and banged up.
Cards: It seems impossible to not take Fitz here but I'm going with Patrick Peterson. He will replace and upgrade both Browner and Leon. This would complete our elite secondary.
49ers: I really wanna take Vernon Davis here but I think upgrading OG is more important for the offense so give me Iupati. (LB would be easiest to upgrade in draft).
Rams: Quinn could possibily be a product of Long on the other side so it's between Long and Brockers for me. DT is our biggest need but Long is proven. Going with Long.
"If the opportunity presents itself, we're going to come get you. You’re part of the family. You're part of us. You helped us start this thing." - John Schneider before releasing Michael Robinson