I kept a 6 gallon eclipse with mutiple shrimps in the past. It housed: 1 banded coral shrimp, 1 cleaner shrimp, 2 red blood shrimps, 2 harlequin shrimp, 1 peppermint shrimp, 1 sally lightfoot crab, and 1 hermit crab.
My CBS ate my sally light foot when he molted; my pepermint shrimp died...