Great question, yet, very subjective
Disclaimer: My response is nearly all subjective, yet is based on extensive experience.
The following is my "test of accuracy". I take my pistols to the family farm, along with a skateboard. I place the old skateboard upside-down on the hay wagon, and spin the skateboard's wheels by shooting (nicking) the rolling surface of the wheel from 20 paces. Any pistol that can consistently do that is accurate! Remember, "Aim small; miss small."
For me, my most persistently accurate pistols are the the following order:
1. Colt reproduction series 70 in stainless. It feeds any ammunition reliably, and in fact, at present, with well over 5,000 rounds I have never experienced any failures of any form. It just plain shoots, and shoots consistently accurate.
2. Colt reproduction WWI is very nearly its equal. The sole difference I believe it due to the lack of checkering. That makes holding it tightly difficult. The sights are not very desirable either.
3. Browning P35 that will keep pace with these two, but I have put few rounds through it, and so it has yet to prove itself over several months, and several thousands of rounds. I am confident that it will. The sights are excellent, but can be difficult to see.
4. Glock 17 is a close 3rd to possibly 4th. The angle of the grips sometimes take re-accustoming after my 1911 or BHP, but make no mistake, it is a very accurate pistol! The sights are pretty darned good, but the trigger seems to be the cause of difficulties for me. Since it is also a primary CCW piece, no trigger upgrades!
5. Kimber Warrior? Well, frankly, it is a crap shoot to buy a Kimber. While I have owned about 14 or 15 Kimbers, it's always a crap shoot as to the "quality". I have pics of my "custom Shop" Kimbers that would make your hair stand on end that the company shipped them. If you get a good Kimber, oh yeah, they shoot--but when they're bad, they're really bad! My present Warrior is a nice pistol, but I'll never trust it the way I trust those listed above it. The trigger is extraordinary--the best I have ever pulled in my 46 years. But the sights are not precise. It's not a target piece, it's a defensive piece.
Doc2005