And it seems like frequently, those who do come in and make an immediate impact are the smaller, quicker types - the LBs, DBs, etc. Those whose stock and trade is quickness/agility (vs. raw power) seem to come in more NFL-ready, vs. the interior types who almost always have to spend a year (or more) building up to NFL-level strength/power. That's why I would choose Oliver for the most immediate impact.

But then, it does depend on what they want to do with him. If (for example) they need him to bulk up for his role in the GB defense, then forget everything I just said...