What are good tank mates for fiddler crabs?

[Kookie Snatcha]

I was wondering what some good tank mates would be for my fiddler crabs. I have a 125 gallon aquarium, with an sg of 1.008 and 5 fiddler crabs currently live in it. The tank has sand on the bottom, and I have dry land for the crabs already but it doesn't require the water level to be lowered. I was thinking maybe red claws but I heard that the fiddlers and red claws don't get along very well. But anyways what would be some good fish to put in with my fiddlers, I already know about bumblebee gobies. Thanks for the help.