I don't agree with your logic that Reyes and Beltran will not cost a wealth of prospects. There will be teams competing for these guys and major league baseball has shown in the past that it will step in to preserve the best interest of the game and not let stars simply be sold off. MLB must approve all trades.
That said, I am not advocating the acquisition of Ramirez. I wouldn't mind him as a Red Sox if he were to be placed in right field and nowhere near shortstop. And, I don't buy the "natural outfielder" argument. Some of the greatest defensive outfielders were trained as infielders. Mickey Mantle, Juan Beniquez, Tommy Harper, Eric Davis, Robin Yount, and many others became excellent outfielders after being developed as infielders.