Couple of things here and it actually a reply to the community here as a whole not just answering this post which is steller I might add. Your all overthinking the 4 and 3 man front thing.... because of the nature of the base spread scheme it's not as big a deal as it was say 15 years ago.
Gary isn't an OLB... never was he slides down to the off DE position ( Elephant, bandit whatever) and Kenny Clark goes back inside where he can be disruptive. However, most teams are playing a fair amount of 3-3-5 on 2 downs and most go dime on third down so it's not a big deal.
ILB is a big deal and needs to be drafted in round 1 or 2. Yes I know about CB and WR but the longer we wait the dumber we look trying to plug trash into the spot... draft a good one and move on already.
Again same as above the zone or man argument is overthought, everybody plays a mix of the two however GB can't really play Man press with the group it has no matter what they do up front...too slow for that. Off man with combo coverages mixed in seems to be where they make hay and hopefully ML is seeing the same on video.
My point is you don't hire a guy based on personal as much as what he believes and his attitude toward culture etc. MP thought watching last year's beat down on tape before the NFC title game was more important than film study on TB and keeping his defense focused... bad juju.
Last tidbit GB is going to have to dig because the best DC are already off the market this late.

ML takes his time and finds a guy that fits HIS mindset not what we or the front office want.