My last helles was 100% Best pils malt. It turned out almost exactly like Hopfbrau helles. Very clean, light malt character, very easy drinking. Many of the other helles biers I’ve have much more of a Munich malt presence, whereas the Hopfbrau helles has none of that.
If you’re wanting American lager, go with what some others said and do like 80% pils malt, 20% rice or corn. Use your 2633 yeast, hop to 18-20 IBU. The rice solids I think can go in the mash, not the boil.