The answer, as you have guessed by now, is to grow your own sweet corn from a choice of more than two dozen varieties. But, alas, home gardeners face a real dilemma. If you were growing tomatoes or peppers, you could put in one plant of each variety and then do a taste test and pick the favorites. Instead, it's necessary to plant blocks of corn for cross-pollination. Several short rows are better than one long row since the plants best pollinate one another when they are close together.
Corn can go in large containers as long as the containers are close together for pollinating.
This is the place to do a little experimenting, too. Try Hopi Turquoise to make blue flour, Japanese Hulless for popcorn and Inca Rainbow for beautiful ears of rare sweet corn. Remember to stagger the planting dates so the corn isn't tasseling during the same two weeks. When different varieties cross pollinate, one ruins the taste of the other. Supersweet corn, for instance, becomes tough when pollinated by standard corn.