For any kitbash Steve Rogers figure, I would say the Civvy TWS Steve Rogers body would be the best route. However, the only thing with that body is that the elbow joints are pretty conspicuous and not well hidden, if you plan on having him with a t-shirt. If you don't mind that, then I would go with that body if you can find one.
Not sure how much that plain body fetches though in comparison to the other ones you listed. I wouldn't imagine it would be very much though, considering that you can get the full figure at a relatively low price.