There are two other immediate suggestions that are in the same area as Le Cellier. The first is at the Dolphin, and that is
Shula's. It is, in my estimation, the best steak in all of Walt Disney World. It is not, however, a Disney Dining Plan restaurant.
Also nearby at the Yacht Club is the
Yachtsman's Steakhouse, which is also very good, and is part of the Disney Dining Plan.
After this, there are a few other places that, while not specifically steakhouses, offer up a good steak.
Todd English's bluezoo is reported to make a nice steak. The steak with mac and cheese at
Jiko is exceptional, and
Artist Point at the Wilderness Lodge has several fantastic choices. Of these, only bluezoo is not on the Disney Dining Plan.
I hope that helps!
Have a delicious vacation!