Gotta be Dak for me. He and Zeke are both playing near MVP-level, but the tie-breakers are two things for me:
1) In general, it's more difficult to transition from college to pro as a QB than it is as a RB.
2) Watching the Cowboys specifically, we have seen them play damn near full seasons with backup-level talent at QB, and with backup-level talent at RB. Darren McFadden basically resurrected his career with a 1,000 yard season behind that line, meanwhile Brandon Weeden and Matt Cassel looked like they've never played QB before.
I'm not saying *anyone* can run behind Dallas's line - but I am quite confident that it is several times easier to succeed at RB in Dallas than it is to succeed at QB.
So yeah, they're both great, but it has to be Dak in my mind. That kid is fukking fantastic.
Gotta go with Hackenberg third.