Is cheese seasoned by default?
There are dozens if not hundreds of kinds of cheese in the world. 

Several kinds of non-shelf-stable cheese do not contain any added salt, just the natural salt content of the milk. Quark is a prominent example, paneer can also be made without salt. Of course paneer will reflect the taste of the acid that was used, for example lemon juice - it is up to you whether you consider it to be a seasoning or not. 

Cheeses that have a ripening time need salt for conservation purposes, so they are all salted. If you want to taste a low-salt cheese of this type, try Emmentaler - the traditional ones go as low as 0.5% salt, and I am not even sure if this is added or not, so maybe it doesn't even fall under your definition of "seasoned". 

In addition, there are cheeses which also contain seasoning specifically meant to change their taste, for example wild garlic cheese or pepper cheese. These are added to the curds before pressing. Other types of cheese, like some cream cheeses or American cheeses, have seasoning added in an additional processing step. The seasoning in this step is highly varied, and can include not only the traditional herbs but also things like fungi or bacon pieces. And quarks are frequently seasoned with fruit at this step. 

So, there is a huge variety, and you can have seasoned or unseasoned cheese as you prefer.