Best fit on a rifle for me would be my custom M1917 that I had Chris Wilcox make a replacement stock for, I just melt into it.
Unfortunately I now think it’s too nice to take out into the field.
For factory rifles my favourite would be the Weatherby Vanguard stocks and prefer the B&C or deluxe wood versions over the synthetic.
The Sako 75 & 85 Finnlight series are a close runner up for me in bolt guns in regards to shouldering fit but the plastic feel drops it a peg.
Something about a model ‘94 as well; classic, intuitive, fast, light, always on target.
Most fit me great, the only one that really stood out as poor to me on a bolt gun was a Model 70 Extreme…loved the look, features, build quality and price of it but the fit was just completely off putting so I passed on it.