I don't know if there is a best pocket Knife. I love Trappers best, and have a modest collection.
Case is a very good American made knife at a reasonable price.
Buck is another quality brand but watch out for chinese models. Buck subed out some of their knives for a while but they're back in the USA now!
I also have knives by Boker, Kershaw, Schrade, Hen & Rooster,
Kissing Crane, Smith & Wesson, Colt, Winchester, Benchmade, Cold Steel.