Gabriele D'Annunzio - the bohemian poet caesar, the "John the Baptist" of fascism. He'd be pretty old by WW2, in his seventies but he lived until 1938 IOTL despite a serious 'accident' which took him out of Italian politics just as Mussolini was rising to power. Apart from Italian nationalism, D'Annunzio's foriegn policy views centred around oppressed peoples getting their own nation-state. He was pro-Irish during their War of Independence, encouraged anti-Yugoslav nationalists and even backed a Greater Albania.
This might make him more anti-Nazi than Mussolini (if they even rose to power) was in the 1930s and more interested in making ties with the Czechs and Poles. However he was also mecurial so he might end up supporting Anschluss to unite the German people.
He'd be very much a wild card geopolitically, perhaps acting against Hitler sooner through Central European alliances or even simply sitting the war out.