Hard to grade "out of box" as I rarely shoot a gun much before fiddling with something...
Worst out of the box, well where to begin. My first ML was a Traditions Deerhunter, shot ok but trigger pull was more than the gun weighed. Shot a lot of deer with it before I got the work done but it was horrible. Or my second ML, a Traditions Lightning (see a pattern??) with a tight stock/barrel rub and a 10lb trigger. Dremeled the stock and worked the trigger and the gun was accurate, but had a nasty surprise that below about 7lb the trigger/safety group would malfunction and fire the gun if it was ****ed with the safety off!! I'll throw the Encore on this list too, my buddy had a laundry list of problems with his and is still not happy with it.
Best out of the box, Omega X7. It is the only ML I have not modified, everything about it is excellent except I needed a new front sight to shoot bullets under 300gr and get a 100yd zero.
Favorite, thumbhole Omega. I did a lot of work on it, 3/4 of which most people would not do, but it's a real tack-driver now.