I don't think the shiners or sunfish would attack the pickerel, but their activity would stress him out. Pickerel do not like "dithers". Plus, an adult pickerel could take down any but the largest o-spots or shiners.
Crays are always iffy. They would not be OK with the pickerel, he would eat them if they were small enough (the last pickerel I caught regurgitated a 2" crayfish) and would be vulnerable to their attacks if they were too big to be eaten; even Procambarus will sometimes nip slow-moving fish. Procambarus would probably be OK in a sunfish/shiner tank if it wasn't too crowded. Those fish are alert enough to avoid nips. Cambarellus would be better; not sure if you have any native species there in VA, but C. shufeldtii is commonly available from online vendors. In either case make sure the crays have hiding places where they can stay while molting.
There are several other tankmates to consider. Any of the Enneacanthus sunfish or native freshwater killies would be good, as would tadpole madtoms, swamp darters, and most minnows other than the larger chubs (Semotilus and Nocomis sp.) Ghost shrimp would work too; young ones would be eaten, but the adults would probably survive. The common petstore ghost shrimp (Palaemonetes paludosus) is also the species native to VA fresh waters.