I would have to say Caro's book on Robert Moses. Long and very detailed---and yet detailed.
Another would be also very long detailed (not technically a bio)--WIlliam Shirer's --The Rise and Fall of The Third Reich.
One more new one to add to the list----also long, detailed, and you feel you know the subject personally---that would be Clay Eals---Steve Goodman---Facing The Music
By clicking on the User Name, you will requery the forum for that user. You will see everything that he or she has posted with that Mudcat name.
By clicking on the Thread Name, you will be sent to the Forum on that thread as if you selected it from the main Mudcat Forum page.
By clicking on the Subject, you will also go to the thread as if you selected it from the original Forum page, but also go directly to that particular message.
By clicking on the Date (Posted), you will dig out every message posted that day.
sj