There's plenty of options, but I think the GP100 and various S&W K-frames (both with 3-4" barrels) will make up the bulk of belt carried revolvers, with perhaps an uptick in N frame/Redhawks for field/woods types.
If I'm going to carry appendix, it's the GP100 Match Champion with compact grips. I have also carried the GP100 Wiley Clapp 3" strong side. I've mentioned before that I carry a revolver as a primary mainly in two situations. I'm flying somewhere and the gun needs to go in checked bags or I'm backpacking.