The Beyhive sounds the best and makes the most sense. She's called Beyoncé, she's the Queen Bee, her fans ride or die for her, together we're the Beyhive.
Tell me another stanbase name that makes as much sense and is as carefully thought out as that one? I mean, Little Monsters might be the most known one, but it's not appealing at all.
I know, i guess its mostly because how she refers to them as "her little monsters" makes it sound like some sort of weird cult Monsters on its own would be better.