Q.Boxwood
I just had to pull out about 15 diseased boxwood plants in the front of my house and in a few other areas. I am looking for a replacement — the Japanese Holly might be getting the same white powdery blight — I don’t use any harmful chemicals due to the fact that I have raised vegetable garden beds in very close proximity.
Any suggestions?

I would have a soil test done before planting to determine if you need to amend you soil.
These links will help you with shrub suggestions.
https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-7/zone-7-bushes.htm
Also visit your local garden centers for ideas and plants for your region.