Prep the bacon: Cook bacon in a skillet over medium heat until crisp.
Drain on paper towels and crumble. Set aside.
Season and cook the chicken: If using raw chicken, pat dry and season with salt, pepper, garlic powder, and paprika. Heat olive oil in a skillet over medium-high and cook until browned and cooked through (internal temp 165°F/74°C), 4–6 minutes per side depending on thickness.
Let rest, then slice or dice.
Chop the greens: Rinse and dry the romaine well. Chop into bite-size pieces and place in a large bowl. Dry lettuce helps the dressing cling better.
Prep the veggies: Halve cherry tomatoes, dice cucumber and avocado, thinly slice red onion, and have the corn ready.
If using frozen corn, thaw and pat dry.
Layer the salad: Add romaine to a wide serving bowl. Top with chicken, bacon, tomatoes, cucumber, avocado, corn, and red onion. Sprinkle shredded cheese on top.
Add crunch: If using croutons or crushed tortilla chips, scatter a handful over the salad right before serving.
Dress and toss: Drizzle with ranch dressing.
Squeeze a little lemon over the top for freshness. Gently toss to coat, or serve the dressing on the side if you prefer.
Taste and adjust: Add a pinch of salt and pepper if needed. If it feels heavy, brighten with another small squeeze of lemon.
Serve immediately: This salad is best when the greens are crisp and the bacon still has its snap.