NFC South: Devin White, ILB
While Devin Bush played well last year as a rookie, fellow early-round ILB Devin White was impressive as well. Both ILBs are athletic and instinctual, and frankly, both look like they could be very similar starters down the road. Thus, with the long-term question marks at the other ILB spot, adding another young and talented option like White makes the most sense.
Imagine adding White alongside Bush for the foreseeable future. Both players can cover in space as well as rush the passer and stop the run. The Steelers would have one of the most dynamic defenses spearheaded by the talented duo of LBs.
AFC South: Quenton Nelson, OG
The rebuild of the Steelers offensive line is complete with the addition of Quenton Nelson. One of the best interior linemen ever since his rookie year, imagine him and David DeCastro bulling defenders out of the way. Throw in Maurkice Pouncey and it wouldn’t matter who the Steelers started at OT.
On top of this, he is only entering his third season. That means the Steelers would have control over him for the next three years. This would take them through the likely retirement of Pouncey, which means that huge loss could be better adjusted to with the strength of the middle of the unit. Adding Nelson would give the Steelers their next stalwart along the interior of the offensive line.