Ending #4 on the wiki says that if you only kill Pearl, the Legion enslaves the Boomers. However, when I did the quest, I'm pretty sure I had to kill all of the leaders in order to be able to report back to Caesar. I know that some of the endings are glitched, or can't be obtained under normal circumstances, but is this one of them? The same could go for Brotherhood of Steel Ending #2, which talks about the Legion taking out the BoS after the battle at Hoover Dam. But I don't think that can be obtained because you have to kill the BoS as part of the Legion quests.

I'm just asking because I'd like to have the Legion be as active as possible in the ending slides.