Two designs that I am very familiar with are the Bowman motor and the Perendev designs. Both could work using attraction with angles. The Perendev design could work with the following measurements. The rotor magnets must be spaced at 1/2 the diameter of the rotor magnets diameter used. The same size magnet must be used in the stator. The magnets in the stator can be spaced at the same measurement. Spacing should be increased, but not necessary. I have used 25 degree angles from tangent in both the rotor and stator. 18 degrees could also work. I recommend using nothing smaller than 7/8 inch diameter magnets. The length of the magnet is critical. Of course it may still work with using smaller magnets. Shields around the rotor magnets could be used to keep from stressing the magnet fields while being so close together. But should not be necessary to run. No shields are needed in the stator. But they could be used to keep down stress. Let me warn everyone that this design would be a beast. It would be a very powerful engine. With complete wrapping of the rotor with full stator magnets would be dangerous. It would run away. The torque could be huge. Build at your own risk. If controlled, it should run under load until the shaft bearings fail.