IMO, all the chain steakhouses are overrated - Mortons, Ruths Chris, etc.
Not all of these are fancy sit-down places, but as far as the food itself goes, all are highly recommended.
Anaheim White House, Orange Hill Restaurant (technically not Anaheim, but very close), The Ranch, Roys, Okayama…
About a mile from Disney is the anaheim packing house with lots of little restaurants in one building. My favorite is georgias southern food. There’s a speakeasy called blind rabbit - try to get a reservation there on their website. Down the street from the packing house is center street where…
If you enjoy southern style cooking then Georgia’s at the Packing House is your place. Get there early to avoid the crowds and be sure to get an order collared greens. Best you can find outside of the south. Trust and you too will believe.
Great recs already in this thread, but if you want a one-stop shop go to the Anaheim Packing House. My recs inside are Adya (Indian), Iron Press (beer and bar bites), and Georgia's (southern), but there's a lot to choose from.