Glenda, your little fish is probably a female and has been run ragged by the males, just as you suspected.
She could discharge her eggs in the isolation tank, but if there is no male around to fertilise them as they are discharged, they will not be viable.
Part of the male fish's job is to nudge the female fishes abdomen to encourage the eggs to be discharged.
Having her on her own she could become egg bound. You could, if you hold her, gentle massage her abdomen, to help her spawn her eggs.
It maybe better however, to add one male to the isolation tank and keep an eye on the "goings on".
You can hang a string mop-head or a cut up hank of wool, into the water for her to spawn onto. Once she spawns remove the male. Let her rest up until her bumps and bruises heal.
"Horton"

Thanks Horton, I have another Oranda that I believe is a male only because I have seen it chasing some of the other fish. I might can catch it because it will swim into my hands when I reach into the pond. All the other fishes, Comets, Shubunkins, Wakin and Ryukins are much too fast for me to catch and much too large to put into the aquarium. I guess if she had already laid the eggs while she was getting all ragged and worn and I put a male in with her, there just wouldn't be any spawning activity. How often do fish usually spawn a year, do you know? My Wakin is really being chased right now. But is as big as all the others and I think will be allright. Glenda

Glenda, goldfish usually spawn in the spring when the water warms up, but I have seen them flashing, it seemed, all summer. Just like rabbits!LOL
"Horton"

Aren't blugills aggressive fishes? I think they might be the ones that are the cause of your Orandas' ragged fins and tails. I'm not sure what Breams are but I've dealt with Blugills as a kid and they are somewhat aggressive fishes.

I really don't know what possessed me to even think of putting the wild fish in there. Wish I hadn't, but now don't know quite how to get them out. My pond is very deep and rather large. And after waiting a month for the pond to clear, wouldn't want to drain it and start all over. Glenda

Depending on how big and deep your pond is and how important the fancy fishes are to you, personally, I'd drain it, get the wild fishes out and start over. A month is not that long to wait for the water to clear. Otherwise the bluegills might be the only fishes in your pond. bluegills are fast swimming fishes and has razor sharp dorsal fins.

Here is a link that might be useful: bluegill info