It's worth pointing out that Hitler was one of the only figures in the Nazi Party who, prior to taking power, managed to keep the different factions from either going their own way or knocking each other's teeth out. This was partially due to Hitler himself fomenting rivalries to cement his control but also thanks to how utterly volatile the initial Nazi coalition was, considering it was founded on currently or recently middle class Germans, reactionary aristocrats, more socialist-leaning ex-military veterans and stormtroopers and the handful of industrialists who saw the Nazis as a useful tool for dealing with anything on the Left they didn't like. On top of that you had the competing personalities of egos like Goering and the Strasser brothers who, themselves, were quite convinced they should be the ones running the show. Hitler's oratory, on top of that, helped the Nazis stand out from all the other various far right parties leading to them becoming the main competition for far right voters with the DNVP.
If you remove Hitler, particularly his brinksmanship that got him into power in the first place, then it's quite possible the NSDAP stay a minor fascist party rather than what they became.
If you remove Hitler, particularly his brinksmanship that got him into power in the first place, then it's quite possible the NSDAP stay a minor fascist party rather than what they became.