10 Most Powerful Characters Killed By Hal Jordan's Green Lantern
7. Himself - Batman #45
In the controversial Batman storyline, the Gift, Batman and Booster Gold travel back in time to save his parents from their infamous murder. It turned out that Gold did this as a gift for Bruce, who at the time was to be wedded to Catwoman.
This act creates an alternate timeline where Bruce Wayne never became Batman and naturally Booster Gold is the only one who remembers this timeline. He quickly encounters this timeline's Hal Jordan, who had been Jokerized. The traditional version of the Joker does not seem to exist in this timeline but the term Jokers is used to refer to Gotham criminals who become insane.
After encountering Booster Gold, this version of Hal claims that he is capable of doing anything with his ring, including the forbidden act of killing himself. He promptly dies by suicide, and Booster is chillingly unfazed by this action.
Suffice to say, this two-issue arc will not go down as one of the best Batman stories of the last few years.