Preheat oven to 350 degrees F. Mix oregano, pepper, salt, onion powder, and garlic powder together in a small bowl. Sprinkle onto uncooked chicken breasts and place onto the greased baking sheet. Bake chicken until cooked (approximately 25-30 minutes). Cook bacon either in a microwave, stovetop, or baked in the oven.
Cut chicken into pieces that are about 1-3 inches long and relatively thin and place into the medium mixing bowl. Dice bacon into small pieces and mix into the chicken.
Sprinkle naan flatbread with water and place onto a lightly greased baking sheet. Bake according to directions—generally about 5 minutes at 350 degrees F, until lightly browned.
Top flatbreads with chicken and bacon mix, lettuce, tomato, the preferred amount of ranch, and shredded cheese. Serve and eat folded in half like a taco.