Well I know Steve F. could help you on this one,
I'll list the people with the finest RAH models I've seen so far:
1. Sven- Great Rockin'Rollin, Zipper, StarShip2K, Round Up, Fun Slide, Twister, Pirate Ship, and an awesome Ring Of Fire.
2. Steve F.- Great SuperLoops (RAH Ring Of Fire) and he has a Zipper on work.
3. Tamadachi76- awesome Zipper.
4. Dave Cartwright AKA. dcvader- Scooter, Zipper, Gravitron, Round Up, Venture River, Flying Saucers, Convoy, Sky Diver, Alphine Funhouse, Fun Slide, Devils Joy Dark Ride and some kiddies!
5. Dan L.- RAH Side Shows Fronts
6. Chris Hurley AKA, SkyWheelRider- to my knowledge he owns a few pieces like the Scooter and some other ones.
I know their is a few more, but I just can't remember know.[xx(]
Hope this help a little bit.[:D]