Potential sand stirrers:
Starfish - brittlestars, serpentstars
Cucumbers - mopping cukes, tigertails
Urchins - predominantly live on rocks / glass
Shrimps - may eat DSB fauna on sand surface during the night
Snails - Nassarius & Certh, Conchs - Queen & fighting
Clams
worms
Scarlet Hermits
crabs - pom-pom, fiddler, ghost, etc.
Pistol shrimps
Mantis Shrimps -
Small gobies are also good stirrers.
Not! the larger sand sifting gobies.
Can't think of any others readily available in local LFS's.
Mopping cukes & brittle stars do a fairly decent job.