For example, a Winchester 94 was mentioned as having perfect ergonomics and while I agree to a great extent, it can be one of the worst when a scope is mounted on it, especially the older ones that need a side mount.
Though I nominated the Model 94 as a leading candidate for The Rifle That Fits Best
category, I was careful to not mention putting any kind of optical sight on it. With the exception of one Savage Model 99 rifle, all of my lever-actions have the Williams "FoolProof" receiver sight mounted on them. I have an early Remington Model 760 rifle that was made with a stock having a relatively low drop on the comb. It is also best suited in terms of fit (proper eye to stock "weld") with a receiver sight. But in terms of a scope destroying or diminishing the handling qualities of the Model 94 or its ilk, the same can be said for a lot of other rifles, including the AR-15.