Answer: A specialist!
Heart problems require a cardiologist, dirty gutters require gutter cleaners who are trained, skilled and insured to do the work.
Landscapers are typically insured to clean your yard, not to do work at your roofline by ladders. What happens if that landscaper falls and hurts himself? You get sued!
Insurance companies will only cover losses for companies who have paid for the proper insurance that actually covers that specific loss. If a company does not pay the higher premium to cover work performed at a roof line by ladder, which is incredibly expensive, YOU are now the insurance policy.
Don’t use a company to do dangerous work at your home, if they are not fully insured to do work on ladders, at the roofline, and carry FULL workers compensation benefits and liability insurance.
In our litigious society, don’t make yourself a victim!