Ross in LF and Prado at 3B for LHP and Prado in LF and Francisco at 3B for RHP (and maybe working Ross in to face some rightys to keep him fresh) wouldn't be the worst thing in the world. I'd prefer Gordon esp. with Upton likely unobtainable, but this would work plus Ross can play all three OF positions (CF in a pinch, but I wouldn't leave him there for long).
If it was a 1 year deal for Ross i will be okay with it, but he is looking for 3 years and close to 10M. So i don't think is a good option.