I'm leaning toward the younger O-Linemen who've been drafted in the last 4 seasons -- Havenstein, J. Brown, Wichmann, and Donnal. Flashback to Tom Mack's comments from this year's OTA's -- these guys are getting proper coaching on technique; something that seemed to be overlooked by the previous regime.
I'm optimistic that we'll see an improvement over last year, where they couldn't protect the QB or open holes for the running game.
Defense.
I elect Robert Quinn. Quinn's past asset was bending around the edge to get the QB. He also uses the tomahawk chop to create fumbles. His only problem is a bad back. In the new 3-4 defense Quinn can rush and use both his edge bending and his quickness to create havoc in the offenses back field. He also can use his speed move around and attack from different angles. Quinn has the option to rush from a standing position or with his hand in the dirt. It all could help take a little pressure off his back. Quinn gets back to his glory days with the new coaches.
View: https://www.youtube.com/watch?v=FcLccrTlITM
View: https://www.youtube.com/watch?v=ROeqRbEpBVc