Well, about any disc can be a roller disc at some point. Your most beat up discs make perfect roller discs, most of the time. What your looking for is something understable ( For right hand back hand [ RHBH ] ) that will want to flip over to the right on release.
Good new discs for rolling:
Innova: Roadrunner, Leopard, Sidewinder ( IMO, in that order. )
Gateway: Illusion, and....?
Discraft: Stratus, XL, ...?
For shorter ranged rollers, Putters work well, as do very beat in mid range drivers. I think the easiest non-distance roller is a Stingray or a Stratus. These will go far, but probably not as far as some of the driver rollers. Personally, I think the Roadrunner is the best, and its what I use.