Preheat a grill or grill pan to medium-high heat.
Pat the chicken breasts dry and rub with olive oil. Season evenly with the kosher salt, black pepper, garlic powder, onion powder, and paprika.
Grill the chicken for 5 to 7 minutes per side, or until the thickest portion reaches 165°F (74°C).
Transfer the chicken to a cutting board and let it rest for 5 minutes before slicing.
In a small bowl, whisk together the ranch dressing, lime juice, garlic powder, and Dijon mustard until smooth.
In a large salad bowl, combine the romaine lettuce, cherry tomatoes, cucumber, red onion, parsley, cheddar cheese, kosher salt, and black pepper.
Add half of the dressing and toss lightly to coat the vegetables.
Arrange the sliced grilled chicken, avocado, and bacon over the salad.
Drizzle with the remaining dressing.
Top with the croutons and serve immediately.