Even if you are driving by yourself a guide could be hired to lead you around and usually is a way to have more details about the area. I can recommend these my colleagues in Parma: https://exploraemilia.com/guide-parma-reggioemilia-piacenza/
As for tasting different producers of Parmigiano, to taste the differences, a grocery (or cheese monger) is a better place, otherwise you must travel a lot o find the different producers. Remember that the production process is always the same in each dairy for Parmigiano: the difference is made by what the cows eat and the kind of cow. Of course even the aging affects the final taste, but is a "vertical" tasting who give you the chance to feel it.
I now mainly dairies where I lead groups, so not the ones who make internal tours in English. Maybe Ciao Latte, east of Parma. A special ones could be Caseificio Rosola, near Zocca (Modena province), but rather far from Parma (1.5 hours driving, not less).
A general tip: go in the morning to watch the whole process, the Parmigiano must be produced in the morning. If you have a guide and plenty of time you can even arrive early to watch the curdling moment.
For prosciutto I can suggest Conti and La Rosa dell'Angelo. Probably in the second one they do better internal tours in English. Can be done even the tour of the black pig breeding.
Prosciutto di Parma is made only in few villages in the hillside, so the 90% of producers are in Langhirano and neighborhood.
All prosciutto and Parmigiano-Reggiano makers are real producers, so are production facilities, not museums or touristic places. So don't be worried to find an authentic place, but you could be worried for odors (the pig flesh, or the manure...).
A special cheese that can be found on our region is the "pit cheese" (Formaggio di Fossa), but is produced in Romagna, near Sogliano. Can be found in some good cheese shops all around the Region.
For Traditional Balsamic of Modena there are several producers (called "acetaia") who do tours even in English: San Donnino, Leonardi, Giusti for example. But even the acetaia of the Modena's Townhall can be visited (inside the tower of the Townhall, obviously).
For a tasting I can suggest the shop of the Consorteria in Piazza Mazzini (in Modena), because they represent a wide group of acetaie, so is a place where you can taste different ones (horizontal tasting).