Les Baer isn't listed. I own a Kimber. I am not sure I like being restricted to the OP's list. There are a plethora on fine craftsmen building fantastic 1911's. The OP's idea of "best" is very likely different than mine.
What a "loaded" question. By best do you mean drag it through the mud and have it go bang, the most accurate, the prettiest...?
I believe the answer boils down to are you a Lexus or a Toyota kind of person? If you have to have a Lexus the Kimber, Christiansen arms type 1911 will appeal to you. If you would rather get a Toyota then RIA will do what you desire for a fraction of the cost.
Kind of a loaded question.
I have own several different 1911s and have to say I like the preWW1 the best. However since there is so few around and the prices are no longer affordable that it is no longer a viable option.
In that case ( please don't flame me) I like the 2016 Norinco sports model. If you get one that's a good shooter and not to mention they come with hard chrome barrels they will last you a life time. And they are cheap in price just like me.
For current production 1911s I have 2 Kimbers and a Sig. The Kimbers are both really good, nice features, great fit and function. However, for the same money the Sig is head and shoulders better. Smoother and tighter than the Kimbers, great trigger and way more attention to detail. My vote is Sig if you can get used to that squared off slide.
That said, I have a 40 year old 70 Series Mark IV, I have yet to shoot a modern production gun that compares to that Colt.
I have 2, a Colt National Match and a Les Baer TRS. The Les Baer will shoot lights out more accurate, and is tighter fitting than the Colt. I have shot a Taurus and either one of mine will outshoot it. No experience with any of the others.