I've trialed hundreds of bush beans, with only a few that I REALLY like. Dragon Tongue is one of them.
Contender is the worst tasting bean I've ever trialed.
To me, pole beans generally have much better flavor, with flat podded "romano" types being my favorites.
The best new trial in my 2016 garden was an unknown variety of a "stickless wonder" type bush yardlong bean (20" plants with 19" (dry) pods).