Ezekiel Elliott. Final answer. And my reason is on fumbling alone.
Elliott has fumbled more than Demarco Murray over the same timespan. However, Murray had a tendency of carrying the ball like a loaf of bread at time.
There is no way of providing it but I will state there would have been a far less likely chance of Elliott fumbling during that key drive against the Packers in the 2014 playoffs. Murray had a HUGE hole to run through. Julius Peppers was clearly blocked out of the hole by Zack Martin but Peppers reached back into the hole and stripped Murray of the ball.
Ball security is an every player responsibility. It is not whenever a running back decides to properly cover up the ball running through the freaking line of scrimmage. Remember your Pee Wee football training!
/old but fresh rant