Other than Favre, I wouldnt call those other ones "successful." Brunell had some success, but I was never really that impressed by him. Hasselbeck has never been able to stay healthy enough to take his team anywhere significant. Brooks always seemed like a game manager type as well.
Jury is still out on Schaub. He seems like a great QB, but it seemed like the Texans did fine without him for part of last year.