If any of those guys want GM duties, I wouldn't hire them. Coaches can not double as GM's. It doesn't work.
Holmgren knows that so he isn't going to ask for them and Shanny got in trouble in Denver when he took over as the Personell guy. They'll want say, but you need to have a GM.
I think Angelo's job is probably safer than Lovies and I've been a huge Angelo backer but this year has been a meltdown. Still, I liked the theory of what Jerry did and I put a lot more blame on Lovie for what has happened cause I think Lovie did a horrible job evaluating his talent on the field and Jerry listened to Lovie a bit too much.
That said if your going to let Jerry bring in his guy at coach, it means your going to let him stay another few years cause you can't fire the coach and than fire the GM a year later (with a coach who he didn't pick running the helm...thats just bad business, imo).