Outside of wine, I’d strongly recommend the book ‘Italy for the Gourmet Traveller’ by Fred Plotkin.
Oddly, not for the food recommendations, as whilst it’s a decent selection, there are too many resting on faded laurels, and too much of a focus on the easy, central places. The Golosario is the annual publication that is much more thorough.
However… I think his descriptions of regions and locations in those regions are superb. They’ve really helped me in shaping holidays, finding the variety I seek, and finding bases that really suit.
Now to the wines. Many of those you list are top names. Prestigious wines, but they can be atypical. For sure, when selecting wines to bring home, I see the logic of cherry picking for the limited luggage space. However whilst there, I think you’d be missing out if you just drink the most prestigious wines of the region. Instead, understanding the local food / wine culture happens best when pursuing the ‘typical’. e.g. real Lambrusco with cured meats and maybe some hard cheese, shows one of the great food/wine matches, lifting a somewhat rustic wine, whilst also elevating the food.
Is it those regions that you listed, that you are visiting. If so, I’d say it’s absolutely right to focus on them. Drinking local often (but far from always) means better food matches, plus you’ll enjoy the smile you get when you choose an interesting, but not famous wine from the region (e.g. I can still recall the happy surprise from the person at the shop when buying a Freisa di Chieri and a Vespolina from Ghemme).
Mariano’s suggestion of Foradori absolutely fits the low intervention preference. Natural and organic, without trumpeting those credentials, plus the only winery I’ve visited that included their composting in the tour of the winery (and very neat it was too).
For Tuscany, I’d focus on where you are staying, e.g. Chianti, Montepulciano, etc. but if it’s Firenze, then the whole region is fair game.
For Emilia-Romagna, I’m a huge fan of those taking Sangiovese seriously, with Predappio a nice little hotspot (Drei Dona and Chiara Condello). Also the amazing social venture that is San Patrignano. Not the very best wines, but the very best in humanity.