Regrettably, the Italian chef living in the UK for a long time Antonio Carluccio has died this week aged 80. I'm not sure how well known he is in the US, but he was one of the first Italians to have his own show on the BBC.
I personally think his cookbooks are a bit underrated and I owe much to him. They were one of the first Italian cookbooks I owned, and I still use them to this day - despite having a much larger collection of Italian cookbooks now, including old regional classics from the likes of Ada Boni etc. His style is very traditional, and you'll see his background from Southern Italy shining through. Later in life his family moved to Piemonte so he is also well-versed in Northern Italian cooking.
His dvd series Southern Italian Feast are also worth checking out.