Steven Pinker writes really well. I recommed his book on good writing: The Sense of Style
Strunk and White is a classic but I'm really enjoying Steven Pinker's The Sense of Style, which has several critiques of Strunk and White (and other style books).
Pinker's basic premise is that we should understand why certain things are stylistically better, rather than just giving rules that appear to be arbitrary. The book is loaded with plenty of examples of great writing and he does a great job of elucidating what makes it work.