So, newbie chicken owner update. Glad this popped up in my feed cause I couldn't find this post for a while and wanted to update it. Turns out I was totally wrong about the frizzle thing. At least, as an adult he doesn't have any frizzled feathers. He went through another juvenile molt after this one, and all the curled feathers went away. He looks like a RIR mix as an adult (so our working hypothesis is again Green Queen), and so far, we are keeping him. Crows occasionally throughout the day and only a few times at night. No human aggression (yet, he's 6-7 months old so still growing), and he mates occasionally throughout the day. He has 12 mature hens at this point and he's not over-mating anyone. The hens aren't scared of him, although they will squawk when he jumps on them (he's at least 10 lbs I think - really heavy bird), and they will occasionally groom him. He leads them to the roost at night. I don't know that he interferes with hen squabbles, but he doesn't seem to create stress in the hens, so I'll call it a win.
Here's pics of Speckle at 4 months old. His comb has since grown to 2.5" tall (not floppy), and his tail has gotten a few inches taller. His coloration is about the same at six months as shown here. Eventually I'll get some grown -up pictures of him...