If I get this right, you want something with a crazy backend but a smoother break point and less hook than the buzz ?
That doesn't make to much sence if u ask me
If I were you, I would look to fill the gap between the Buzz & the WCP, because in my humble opinion, the greatest gap is there.
LM really has a big choice for balls on med/light till med-heavy.
If u like the "bug"-line, your hornet & buzz, I would consider the Sting.
If u want something smooth: can't go wrong with a XS power, but it won't have a crazy backend, and won't jump off the dry like pearl-stuff (your buzz).
If you want a big backend: big-r-bang.
Also I wouldn't overlook the Strike serie, the Sure strike & Counter Stike.
Allthough the SS could be too close to your buzz, and the CS is maybe too smooth for your likings, being particle.
Well, just giving some random thoughts, there are guys with far far far better explanation than me, I'll let them do the job (Charlest being one of them).
Greetz.