Robert Caro as a Model
In today's New York Times (9Jan20) there is an article about Robert Caro, author of monumental histories of Robert Moses and LBJ. His research and writing are monumental as well. You are unlikely to finish writing a Caro book in time for tenure review, unless it began as you dissertation. But few academic historians as as revered as is Caro. While it is foolish to expect your dissertation work to be as pathbreaking as is Caro's work, still it sets a standard for effort and writing that may well inspire you, not a bad thing. Choose your heroes with care, and surely do not restrict them to professors and the like.