Although it is technically not on Disney property, Bull & Bear at the Waldorf Astoria can't be beat. Its a very short drive (or uber), being located between Caribbean Beach and Typhoon Lagoon.
We’ve had many excellent steaks at Yachtsman Steakhouse! My now ex said his steak fell off God’s grill! Also, Jiko and Calif Grille have very good steaks. If you also have adventurous eaters who wanted something other than a steak, Jiko would be my choice.