tuna clones, green machines, birds, jet heads, hex heads, zuker's, wideranges, venturi jets, etc.....you should carry a wide assortment of lures in various sizes, actions, colors (see Does Size Matter discussion).
Fresh ballyhoo.........unless natural baits are brined or skirted, once rigged, they have a tendancy to wash out quickly when trolled. If you're trolling a dredge, replacing washed out baits becomes a time consuming distraction. From a purely economic point of view, using naturals may be a bit more costly than artificials.