Emmitt was dominant before Larry Allen got there. He put up some awesome seasons with 3 or 4 of the OLs from the 1989 team that couldn't run to save their lives.
No doubt Dallas had great OLs but Emmitt was great before their OL became a dominant unit. Mark Tuinei had been in the NFL since 1983. Nate Newton had been in the NFL since 1986. Emmitt Smith was drafted in 1990. Those two players were elected to 8 Pro Bowls combined with Emmitt and 0 without him. In 1993, Emmit Smith held out. The Dallas Cowboys started off 0-2. Emmitt returned in the 3rd game but was not ready to play so he only carried the ball 8 times. Dallas won but only scored 17 points. In the 3 games where they basically were without Emmitt Smith, they averaged 14.3 PPG. In the remaining 16 games(counting the playoffs), Dallas averaged 26.8 PPG.
In those 16 games(counting the playoffs) that Emmitt played, he rushed for 1721 yards, 5.0 yards per carry, and 12 TDs. In the 2 games he fully missed, his backup Derek Lassic rushed for 127 yards and 3.7 yards per carry.
Yea, Emmitt Smith being carried by his OL and that offense is a myth. Smith was a HOF HB on most any team.