"Fighting revolvers" have been my primary interest for a couple of decades now. The most traditional version is a six shot N frame with a four or five inch barrel and fixed sights, and a cartridge which starts with a "4". This Model of 1950 Military in .44 Special is the archetype:
Similar guns are available as "classics" or "reissues", such as these from S&W:
The nickeled gun is an S&W Model 21 in .44 Special, and the blued gun is a Model 22 in .45 acp. Both are from the "Classic" range, and while I believe both are discontinued, they are widely available from auction sites.
While I continue to believe that they all are excellent fighting guns, they are all really big. Open carried OWB, most of us would have no trouble, but IWB as CCW guns, well, they're annoying.
And so we ended up with Jordan's take on a fighting revolver:
I carried this Model 19 every day for decades, and I still believe it is a wonderful compromise. I trust the "4" cartridges a bit more, but the .357 has a hell of a track record. And it sure is more pleasant to carry than an N frame! I incorporated some of Bill's innovations, like rounded corners on the rear sight blade, and a DAO trigger, and I still pack it when I'm in the mood.
I got old, though, and my hips got pretty tired of packing full sized guns. My fighting revolver these days is the ridiculous 340PD:
It sure does pack easy, but it's a serious compromise. I hope - now more than ever - to never get myself into a gunfight!
Short version, in 2023, with far more years behind me than ahead: if I was going to carry OWB, with the most effective revolver I could get, it would be an eight shot N frame in .357 Mag or .38 Super, cut for moonclips. For IWB - as a young buck who doesn't mind the weight- it would be the modern Model 66, or the 69 loaded with .44 Specials or mild .44 Magnums. And for everyone else, who wants to be at least technically armed but doesn't want to live his life around the gun, it would be the same ridiculous 340PD that I now carry every day.