If you're going to take a good, tough, instinctive, and mature player then why not Tyson Jackson. He's that and he fills a huge need. Not to mention I think he's a higher rated player than Malcolm Jenkins at least on my rankings.
The gap between Jackson and Jarron Gilbert is huge. The gap between Jenkins, Darius Butler, Vontae Davis, Alphonso Smith, and even Sean Smith isn't that huge.
I would argue that Davis has a better overall skill set to be a corner than Jenkins. I also think Darius Butler is capable of being every bit as good as Jenkins as well.
Jenkins brings versatility as he can play safety, but not at a top ten level IMO.
I look at Jackson and I see the best player at his position by far and the second best 3-4 defensive lineman in the draft.
Jenkins at nine doesn't make the Packers better.
Of course all that matters is what Ted Thompson thinks and everything you said about him very well could be what Thompson is thinking. He does like those types of players.