Sorry to hear that the harmony is broken for a few of them.

I don't have a lot of disharmony. Sam does get jealous and will pick on Emily because she's so small, so he can be aggressive. Even as the largest at 17 pounds, Emily is the only one he can punk out.

Spunky annoys the other cats but really isn't aggressive. At 9 pounds he can send even Sam running. A water bottle gets my point across.

I hope you don't have to re-home Pearl. I had to re-hone Bertie because she growled at everyone constantly. WE have a sort of Peace now.

Good luck!