Can't see Annihilators winning this, barring bfr. They aren't powerful enough to deal any damage, individually or combined and they can't drain him as ... well, how much energy does it take to smash the dark dimension like WBH did?
On the other-hand, WBH can and should annihilate a few of them instantly with a decent planet annihilating gamma burst. Surfer would be the one that is going to cause him most trouble, I don't see WBH defeating Surfer easily, if Surfer decides to absorb and deflect the energies WBH is spewing (remember, Surfer did this to UniLord, and he's probably around WBH levels) whilst dodging the excess or shunting it out to somewhere else.
Surfer's versatility, used smartly, should see him stalemate WBH for a long time, but ultimately WBH should exhaust and destroy Surfer too.