For Dining Plan choices, you can consider these: (Being your first trip, I will try not to bombard you with Dis Board acronymns)
Ribs:
Flame Tree BBQ in Animal Kingdom
Fairfax Fare in Hollywood Studios
Trail's End or the Hoop Dee Doo Revue at Fort Wilderness
Steak:
Can be found at many Table Service restaurants. Among the better/more popular are:
Le Cellier in Epcot
Teppan Edo in Epcot
Brown Derby in Hollywood Studios
Yachtsman Steakhouse at the Yacht Club Resort
California Grill at the Contemporary Resort
Flying Fish at the Boardwalk
Citricos at the Grand Floridian Resort
Pizza:
This can depend on the style of pizza that you are looking for. I prefer thin crust, New Haven style pizza. While not exactly the same, a similar style can be found at:
Via Napoli in Epcot
Wolfgang Puck Cafe/Express in Downtown Disney
California Grill at the Contemporary Resort (called "Flatbreads" there).
Much of the rest of Disney World serves thicker, commercial crust pizzas more in line with a Boboli store-bought crust with sauce and cheese. Not my thing.