I'm very high on Quinn Johnson right now, but going with my favorite piece of the game, passrushing, I'd go with Aaron Kampman. I hope he'll light some QBs up.
He should have the edge in 4 games at least with the horrible Lions' O-line and the weak right side of the Vikings' O-line. If Pickett/Raji (Asuming Jenkins will play the right side and Kampman the left side, mainly) can make it work and get some O-linemen out of his way, I think he'll get quite a couple of sacks and pressures.
Ofcourse, I love Jennings, Driver, Tauscher etc. for the people who they are. Just a fine couple of human beings.