Heat olive oil in a skillet over medium heat.
Add chicken with chili powder, cumin, smoked paprika, garlic powder, salt, and pepper.
Cook 3 to 4 minutes until warmed through and lightly golden. Set aside.
In a small bowl, whisk ranch dressing, salsa, lime juice, chili powder, and smoked paprika until smooth.
In a large bowl or serving platter, layer romaine lettuce, tomatoes, corn, black beans, avocado, red onion, and cheese.
Top salad with warm seasoned chicken.
Drizzle with Southwest dressing just before serving.
Add optional toppings such as tortilla strips, cilantro, or jalapeños if desired.