I voted .44 Special. I have had some sort of .44 magnum for most of the time since the early seventies. Because of that, I just never felt the "need" for a .45LC. A lot of that time I was too busy to reload for an additional caliber. Since I have retired, I sometimes spend days at a S-I-L's ranch. I generally carry a ..44 Special Ruger Flat top, 4 3/4, SS, while doing chores like feeding, breaking ice, spot brush eradication, and etc. it carries easier than my 50th magnum - another favorite.
The special has plenty of power for anything that I might run across, from rattlesnakes, to cougar, to poachers. The normal nemesis is snakes, coyote, pigs, and porcupine. This, along with a Mini-14 and a Model 12 on my Mule can solve most anything that a gun is required to solve. The special will do good enough, even if the long guns are absent. Light, accurate, milder recoil than big brother. Just seems right. But one of the 1911s would fill the niche just as well. Ranches and single actions just go together.
Jack