Listings of juglone tolerant plants are the same as those for deer resistance.......depends on which list you are reading and the area it originated from :-) IME, I would pay closer attention to lists of plants that are sensitive - at least there is some firsthand experience that these will NOT work. Otherwise, lists of tolerant plants are somewhat limited by whether or not anyone has actually attempted to grow them under those conditions, therefore sensitivity is neither confirmed or eliminated.

Give it a try! And then you can add your own results to the list :-)

I grow a Fothergilla gardenii near (never tried under) a black walnut without issue.

tj