So my thoughts on this question:
#1 -- It'll be Hurd. Mac's gonna be a stud for us, but Jalen has a one-year head start in experience at the SEC level.
#2 -- Pig's gonna rock out his senior year. He's driven to make the NFL, this is his shot. He may get hurt doing it, is the only down side. Shy has to wait till 2016 to be the be best #2 on the team.
#6 -- TKJ. Kamara is going to be explosive, but he has to split time with Hurd. TKJ is going to cement his place as a starter by the end of the year.
#8 -- I really want to say North ... and I'm gonna ... but dude has got to finally show us what he can do, for a whole season. He needs this year to be B.I.G. and we need that from him.
p.s. Just realized you could have meant the question the other way, as well. In which case I pick #1. The Hurd/Mac combo is just too potent to pick any other pairing.