For West Wing, I'd kill Will Bailey to get Mrs. Landingham back (I don't have anything against Will, I just don't like him quite as much as other core characters).
For Thirtysomething, I'd kill Ellyn to get Gary back, though honestly, I'd probably be okay with losing Elliot or even Melissa for Gary.
For Harry Potter, I'd kill Ron to get back Fred (Ron's okay, I don't think he was a great friend, but I don't he was an awful person, I just don't like him anywhere near as much as Fred). I'd kill Victor or Fleur or any of the useless officials to get back Cedric. I'd kill Fawkes to get back Hedwig (I really like Fawkes, I just like Hedwig more, and I feel like they're about as important as each other).
Re: What character would you sacrifice for your fave to come back to life.
For Thirtysomething, I'd kill Ellyn to get Gary back, though honestly, I'd probably be okay with losing Elliot or even Melissa for Gary.
For Harry Potter, I'd kill Ron to get back Fred (Ron's okay, I don't think he was a great friend, but I don't he was an awful person, I just don't like him anywhere near as much as Fred). I'd kill Victor or Fleur or any of the useless officials to get back Cedric. I'd kill Fawkes to get back Hedwig (I really like Fawkes, I just like Hedwig more, and I feel like they're about as important as each other).