Most cheese is fine as long as it's pasteurized. In the US we normally pasteurize all of our milks and cheeses (it's indicated on the packaging). You hear a lot that the soft cheeses aren't good but I eat goat cheese all the time and my Dr said it's absolutely fine.
Just ask if it's pasteurized, most of them actually are. I eat pasteurized soft cheeses all the time :)
Bleu cheese should be fine as a dressing since it is most likely pasteurized. But if it's the actual soft cheese version it's not.
The one that is an issue is Caesar salad since its typically made with raw eggs.
Perfect! Enjoy!