Currently I'm writing a paper whose aim is to make comparative analysis of two ethical visions: that of Friedrich Nietzsche and that of Keiji Nishitani (Kyoto School associate). Early on, I made a distinction between modernist and postmodernist accounts of both Nietzsche and Nishitani and choosed to follow the modern one because it seemed to be more productive. In his paper on epistemology of Nietzsche, Karl Laderoute made a modern/postmodern division as well and put Brian Leiter in modernist camp. Not gonna lie, Leiter's reading appears to be very convincing with its clear structure and multitude of references to the original material (take his article on SEP as an example). But on the Internet, here and there I found some bits of critique that usually revolve around his misapprehension of some Nietzschean ideas and that a lot of his views on philosophy of law and religion are also quite misguided or contradict factual information.
With this in mind, does Nietzschean scholarship consider him credible? And if not fully, than what other modernist readings on Nietzsche's ethics can you recommend (besides obvious choice of Walter Kaufmann whom I've also employed)?