Based on my experience, I can highly recommend the 45-85! Always, of course, based on the requirements or the motives.
But for landscape, portrait and street (as far as it works with the giant thing) this is a very universal lens.
There are also very inexpensive and well-preserved copies of it!
The (FA!) 120mm macro is also a very good choice! FA, because there is only a marginal difference in price.
Below an exmaple with the 45-85mm @45mm, f20, ISO100
I own the 645z for 3 months...here are some of the results
https://www.flickr.com/photos/thomasschwarze/albums/72157715883289752