Guglielmo VII, Marquis of Monferrato: OTL around 1260, with a mix of ruthlessness, ferocity and luck, often changing sides between Guelphs and Ghibellines, he managed to first conquer a large part of southern Piedmont, to then control Pavia, Vercelli, Novara, Alessandria, Tortona, Alba, Genoa...