Funny thing, discussing K frames and perfect guns. I think of my 2" Model 10s as perfect. However, my 4" Model 10, standard* barrel, worn nickel, marked Wells Fargo, is such a perfectly accurate shooter it is hard to gainsay that revolver as being perfect. It's an amazing weapon.
I have 64s, too, they happen to heavy barrels, and I have an incredible M10 HB in .357 Magnum, but that old Wells Fargo gun is really something. Perfect. I guess....
*Some folks will whip you with a wet noodle if you say "pencil" barreled. Jus' sayin'...