Preheat the oven to 400°F. Pat chicken breasts dry with paper towels.
Mix salt, garlic powder, onion powder, paprika, and black pepper. Rub chicken with avocado oil, then coat with the seasoning mixture.
Bake chicken on a baking sheet for 25–30 minutes until it reaches 165°F internal temperature. Rest 10 minutes before slicing.
While chicken bakes, bring a medium saucepan of water to a boil. Lower eggs in, simmer 12 minutes, then transfer to an ice bath and peel when cool.
Cook turkey bacon in a large skillet over medium heat until crispy, 8–10 minutes. Drain and crumble once cool.
Wash and thoroughly dry romaine in a salad spinner. Wet lettuce shortens fridge life.
Slice cooled chicken, quarter the eggs, halve tomatoes, and dice cucumber.
Layer 5 compartmented containers: romaine and cucumber in the large section; chicken and eggs in one small section; bacon and blue cheese in the other.
Portion dressing into separate 2-ounce containers (about 2 tablespoons per serving).
Add avocado fresh each morning, or store slices separately with lemon juice pressed against plastic wrap.