I can recommend two, Dario--both from the early Sixties:
"Mafioso" (1962), directed by Alberto Lattuada, starring Alberto Sordi as an honest Sicilian who migrated to Milan, has a supervisory job in the Alfa Romeo plant, married a blond, Northern Italian woman. He and his family return to Sicily for a family visit after many years' absence. The first half is a riotously funny comedy, as only the Italians can do it. The second half is a deadly serious murder plot into which the hapless Sordi is drafted. This is a great movie--one of the best I've ever seen. But I only saw it once, in theatrical release in ' 62. It's not available on VHS or DVD here in the US.

"La Smania Addosso" (1963), a.k.a. "Eye of the Needle," is another Sicilian Mob story that's mostly comedy. It stars the great Vittorio Gassman as a Mobbed up lawyer. I don't remember much about it except that I liked it a lot.