Hi Miklada,
Fairy wrasses might do fine, gobies and blennies probably fab, along with a jawfish? Remember though, any fish can take a mind to go after a worm. I have a maroon clown that was very happy in her BTA for six months, but then I guess the
feather duster next door started to mouth off and she took offense, and well... the rest is a Macy Gray album.
Good luck, I would love to add a Christmas tree worm rock to my collection, but it always seems like the rocks & worms I see locally are pretty poor examples of what I see diving.
Chris