I picked up 2 peppermint shrimp that hang upside down in my live rock. I also have a couple of hermits and a moon snail. As far a fish, 1 damsel and 1 pajama cardinal. My yellow clown goby went missing last week. Another cool additional would be a feather duster.
I have a bunch of polyps, hairy mushroom and watermelon mushroom, frogspawn and a Xenia. Looks great having a variety of fish, corals and inverts in your tank.