There are a lot of great running backs in Madden 19, and plenty of Madden Overdrive Coins great offensive linemen too, but no team to be a combination from the two that will compete together with the Dallas Cowboys.
Ezekiel Elliott (OVR 92) could be the main ball carrier. The third-year man has averaged over 100 yards per game already, knowning that production is reflected in their 92 speed, 95 agility, and 92 juke move. That combination means he is able to dodge defenders inside open field and try to escape from everyone. If it had been just Elliott that could be tough enough, but tackling him is virtually impossible thanks towards the offensive line blocking for him.
Tyron Smith (OVR 95) is the most beneficial run-blocking left tackle inside the game, Travis Frederick (OVR 96) would be the #2 run-blocking center, and Zack Martin (OVR 96) may be the #2 run-blocking right guard. There are only six offensive linemen with the Madden NFL Overdrive Coins OVR of 95 or even more, and also the Cowboys have three ones. Martin and Frederick have top four run block power stats, and also the Cowboys just spent their 2018 first round pick on Texas guard Connor Williams, providing you a young stud with lots of potential to slot between Smith and Frederick.
Oh, of course, if Ezekiel Elliott goes down then you've got rookie powerhouse Bo Scarbrough (OVR 71) which could take over and excel.