On a large platter or cutting board, start to arrange all the ingredients in clusters, allowing people to choose what they want in sections. Group the potatoes, tomatoes, corn, tuna slices, shrimp, greens, drained artichoke and olives, as well as the hard boiled eggs. Chop the basil, chives and thyme, and coat the salad liberally with the dressing, topping with the herbs. Sprinkle with salt and pepper and enjoy at your leisure - this one sits well!