Arrow Crabs, very proficient at eating bristleworms even a very large worm. I have always had to return my Arrow Crabs when they got too large and obnoxious.
Dottybacks, will also eat them but can be extremely aggressive and much harder to remove.
Knee high panty hose with raw fish, hose tied at the end, placed in tank at night. The worms come to eat and get tangled the fabric, simply remove in am.