For general purpose knife (one large blade), I’ve been happy with an Ozark Trail brand knife I got in the camping section of Wal-Mart.
I use mine constantly. It sharpens easily, is heavy (4” long closed, 7.5” open), has a locking blade and a serious beltclip bradded to the knife body. It has a smooth edge, not serrated, which works best for me.
Plus, its cheap...twelve bucks, so when I lose it, it’s no big deal.