I went through a period of about twenty years where I read nothing but fishing books. I've read a lot, most of what's been listed. One name I don't see mentioned is Steve Raymond. I don't think the fact that he's kind of my dyslexic name-sake influences me. His books pretty much all have a west coast/steelhead bent, which intrigues me though I've never done it. Year of the Angler and Year of the Trout are a couple of good ones. His Blue Upright is on the shelf, ready to read next.
I'm another a huge Gierach fan, and like Dave Hughes too.
The mass of men lead lives of quiet desperation, unless they fly fish... with apologies to Thoreau