I was a fan of the 475 Linebaugh from Ross Seyfried's writing. I was hooked after shooting one of the earliest Hamilton Bowen's Ruger Bisley conversions.
I have had a Freedom Arms 4-3/4" for many years & also a BFR 6".
The 480 Ruger to me is about as much as I need in North America. I have 480's in double actions & single actions of various barrel lengths. The 400, 410, 420 grain flat point hard cast at 1100-1200 fps are relatively easy to shoot. The Ruger Bisley 4-5/8" in 480 is a handy companion revolver.
The 500 JHR, which I don't have, is another cartridge that I like. But, I am heavily invested in and committed to 475 / 480.
I have a 500 S&W X-Frame, 4" including compensator. A potent cartridge. I do not care for the bulk that is necessary to house it in revolvers.
The combinations of 454 / 45 Colt & 475 / 480 have been my favorites.