Ask this question on the internet ... receive 1,000 different answers. Totally subjective, especially since most folks on these forums either stick to one or two manufacturers or simply can't afford to buy different maker's models or more expensive guns.
Far as I'm concerned, this question is only answered with years of experience at the range, seeing what's out there, doing a lot of shooting on one's own, and paying attention.
You're just not going to get good answers by asking this question of internet forum posters. Every "enthusiast" will have a different answer as far as his or her choice for an accurate autoloader.
All that said, as far as my experience goes: I've shot a number of different 1911s (from production-grade to custom) that have delivered what I considered phenomenal accuracy.
I've also shot a number of commercial SIG-Sauer, Beretta, Springfield Armory, Kimber but mostly Colt's pistols that have produced stellar accuracy right out of the box.
But ... this topic is pretty subjective, as many shooters' experiences vary widely -- the same as the quality and accuracy of most production semiautos varies.
And generally, for me -- striker-fired pistols have been at the very bottom of the pile.