I'll copy and paste what I wrote on Reddit when someone asked me that.
To be honest, I haven't really gotten that far ahead yet... towards the end of the season I'll probably start taking a deeper dive into those types of things. If you forced me to pick now, I'd probably want Joe Hortiz from the Ravens as GM, and either Greg Roman or Wink Martendale to come with him. I'd prefer Roman, as he's actually done what I spoke about with my original post; when the team went to Jackson as their QB, he completely revamped the offense to take advantage of his skill set as opposed to trying to "square peg" him into what they were already doing.
Despite being pretty young, Hortiz has been with that franchise forever, they've got great working relationships with college teams, and he got to learn under Ozzie Newsome and then Eric DeCosta. They consistently get good drafts out of that organization and that's what we really need right now.