I like that comparatively compact, lighter-in-weight weapons, such as the SAA-pattern, can handle .45 Colt and .44 Special. Of these two, the .45 Colt can launch the larger-diameter, heavier bullet, and, if used in stronger weapons, can be used with +P type ammo. I have much affection for the .41 Magnum, which was my duty revolver cartridge for several years, in the Eighties, after I backed-down from using the .44 Magnum, for that purpose, for one year. The overall selection of bullets, ammunition, and weapons favors .44 Magnum.
The existence of dual-cylinder revolvers, from Ruger, and, I think, other makers/‘smiths, allows the use of .45 ACP and .45 Colt, in the same weapon. That adds some weight toward .45 Colt being “ideal.”
There is no question that I have determined that .45 Colt is closest to ideal, for my personal use case. I have several single-action revolvers, all .45 Colt, with one having a additional .45 ACP cylinder. I have a Ruger SRH Alaskan .454./45 snub-gun, and we have hers-and-his Winchester 94AE Trapper carbines. I actually carry .45 Colt revolvers, some of the time. (Yes, single action, .45 Colt, for concealed carry.)