What to serve at a cheese tasting?
Usually a cheese tasting would have more variety in terms of texture and flavour and you'd progress from the mild to the stronger.  However, if your goal is to compare a lot of similar cheeses to contrast with each other, you'll need to have more palate cleansing and balancing in between each cheese.  

A lot of the cheeses that you're considering are aged ones, which tend to be quite sharp and salty. For the harder/saltier cheeses, acidic accompaniments will be important.  Things like granny smith apples and tomatoes would be ideal.  Something juicy and thirst quenching like melon (or the tomato) would also be important to include.  Proscuitto, while yummy, would probably just add more sharp saltiness to an already overwhelmed palate.  

As for dried fruits, another classic for cheese courses is dates since the sweetness makes a nice contrast.  You might want to consider including something like a raisin bread as well as crackers for serving the cheeses.  Chutney is delicious on crackers with cheese and could help balance the fact that most hard cheeses are eaten as a garnish more than on their own (e.g. on a salad, on pasta, etc).  However, this might interfere with the "tasting" atmosphere you're aiming for.  

If you want to pair with something non-alcoholic, a sparkling water is probably a good place to start since the fizz will be refreshing and the water won't introduce any other flavours to the palate.