Hi Jack,
in Wilmington I've used @Rachel De Faut of Sea River Realty as my property manager, rehab partner, RE agent, etc for ~5 years now. I'm very happy with working with her.
I don't know if she's taking on new long-term rental clients, as she's also a RE agent/broker and also manages short-term rentals. Presently, I think she's more focused on sales.
She charges me a flat 10% of rent, no additional charge for placing tenants, or anything else actually. We try to have good tenant selection, so I don't feel the need to bother tenants more than 1 safety inspection per year. I ask for a video of the property between tenants so I feel confident the places are being kept up. Otherwise, I try to "set it and forget it".
She also adds value to me in that some repairs and turn-over costs are usually very reasonable. I think she has a number of low-cost helpers and contractors and doesn't pad or tack on surcharges to invoices.
She's a small almost one-woman operation, so from time-to-time over the years there may have been a hickup here or there, but overall I'm very happy working with her..
Slightly off the topic of your question is that her greatest value to me has been as my RE agent. She is extremely hard-working and knows rentals and investment properties in that market very well.
I hope that helps,
Joe