But here, shear stresses would apply between the blades and the rings (of which the ring carrying the blades), just like for this design (where shear stresses concern also the parts between the Magnus or Sharp rotors within the ring). So this would lead to the requirement of a robust and heavy manufacturing. And since a second counter-rotating rotor would probably be necessary, the mass would quickly become prohibitive.
Such stresses would likely be reduced in a configuration Flettner balloon and VAWT side by side in the first sketch where both diameters are the same, if it can work.