If you like Ohana's try Boma's at the AKL. The Yachtsmens Steakhouse is supposed to be a good steak at the YC. Some have said the best steak on property.
Artists Point is usually a good meal at the WL. Different meats than cow though.
Well, most people will say that the best steak on property is Le Cellier in Epcot's Canada pavillion. It's great, and totally kid-friendly, but really hard to get reservations. We enjoyed the steaks at Kona Cafe in the Polynesian (it's next to Ohana). It's very kid friendly and everything we ordered was wonderful. (We're huge Ohana fans, too!)
We had great steak at the Turf Club at SSR. It was the best Prime Rib I ever had. It did not have coconut roll like they did at Ohana, but the servers were great for our dds (8,5) and another table next to us had 4 much more active and younger children, and they kept up with them as well.