In the "unique" category, I think you already picked the right model. 7-shot, short but heavy/lugged barrel, stainless for easy maintenance.
In the "Classic" S&W .357 Magnum snubby category, the 2.5" model 19 is the standard. 6-shot, K-frame, round-butt, old ones usually have a nice slick feel to the DA trigger pull. For easy maintenance, the stainless model 66 is the same gun, and was also available in a 3" barrel, for a slightly more unique option. Several old cop friends of mine used to swear the 3-inch M66s "...carried like a 2.5-inch, but shot like a 4-inch." If you prefer the look of fixed sights, an unshrouded extractor rod, and a heavy round barrel, look for a model 13 (or model 65 in stainless). After the agency adopted them, the 3-inch M13 was known as "The FBI gun" for many years.