Sometimes, it takes a good visual to explain a complex set of data, but you don’t need a design degree to make that happen.

Shelby Putnam Tupper is founder and creative director of Shelby Designs Inc., a small-but-mighty, full-service, customer-obsessed design consultancy.

A note on the individual TV models above: We generally test one screen size of a given TV line and extrapolate its performance to other screen sizes, barring any significant differences in specs. We ...