Realtors often have a list of contractors they rely on to help potential sellers get their homes ready for sale. I have found and used recommended roofers, plumbers, HVAC and electricians from a local realtor that wants my future business.
There is, unfortunately, no shortcut to finding quality handymen.
Instead they act as an information hub for homeowners.
Obviously "good realtor" is doing a lot of work here, and I don't know how you find a good realtor (kind of lucked into mine after having a terrible one for my first purchase).