Not especially. An effective speaker? Sure, but the reality is that the NSDAP never actually won an election in the Weimar Republic, and indeed his populist support was already on the wane by the time he was engineered into power.
He rose at a time when Germany was facing severe economic turmoil, and provided a handy scapegoat (and indeed an age old one) in the form of the Jews. In regards to the formation, and implementation, of Nazi policy, that was the work of the ministers and bureaucrats behind him (see: the traditional ruling class that were more than a bit fucking salty about a new democratic republic that threatened their claim on power). The man himself was fairly lazy and spent most of his time sat on his arse in the mountains, holding court and waxing lyrical about, well, himself.
When he did start taking control in regards to the military, his decision making was erratic to say the least, and he made some really, really basic fucking mistakes that lead to the overall defeat of the Wehrmacht.
He was an utter failure as a leader, even if you don’t consider the holocaust (although I don’t know why you wouldn’t). Had it not been for a perfect storm of events and people around him, he’d have remained a non entity that, at most, could talk a good game at a party.