You have to at least step mash. The Germans do a decoction mash. That’s the key to the maltiness.Truth^^^
I've generally been successful in (eventually) being able to brew a given style that eventually meets my goal.
BUT.... the perfect Helles has always been my elusive butterfly. I've got all the ingredients set to go next weekend, and will be building and decanting a 2+ liter fresh starter of 1st generation Ayinger strain yeast starting Tuesday to be at krausen by Friday with 2 growth stages.
Wish me luck.