This question comes up all the time here and results in a bunch of opinions. But, I've never seen anything meaningful come of it.
If you have a rifle built by a reputable smith, they'll stand behind the performance subject to the budget/design limitations you place on the project.
If you go with a small scale specialty company, you're apt to get someone to stand behind the rifle's performance. e.g. Gunwerks, Cooper, McWhorter
Or, you can go with high-end models such as Sauer, Steyr Luxus, Sako TRG, Blaser
Otherwise, there are certain models within each of the major mfgs' product lines that are popular because they are better built and usually better performers. Rem Sendero, Winchester Laredo, Savage LRH or LRPV, Sako A7
Ultimately, I think the best of any of the major mfgs will shoot about equal. Sometimes you get a lemon or a star and some issues are easily remedied while others are not.
Regarding the OP, my best rifle has been a Kleinguenther K14 in 30-06. It's about 35 yrs old and regularly shoots 1/2 MOA with several brands of factory ammo.
Hope this helps,
Richard