Dallas. Losing Elliott sucks don't get me wrong, but they have Alfred Morris, who could probably still be a starter in the league. Behind that O-line i wouldn't surprise to see the Cowboys backfield evolve more into a tandem at least for this year.
Though the one thing Dallas might really miss is their ability to control the clock with Zeke. Morris is more of a boom/bust type runner. When he goes off, it usually means short drives.
Still, i pick the Boys because that country bumpkin Eli can't be trusted unless the calendar reads January.