Harald: Sold his soul to Imu, and when his seal was attacked, the thing Imu used to control him, gained sentience back for a brief moment. But only that.
Xebec: Weakened, but still alive when Garp and Roger "killed" him but was slain before he could recover.
Dorry and Brogy: Killed eachother, but didn't get as badly beaten as Xebec did, so they recovered faster.
Boy, that sure was hard to figure out.