Hello! I don't think cherry shrimp would work out all that well in with those fish. The dwarf gouramis may see them as a very expensive meal! I'd personally go with Amano shrimp because they'll clean algae excellently and get much bigger than red cherries. If you do want wood shrimp though that'd probably work out very well too! Just make sure they acquire the proper nutrients, both those shrimp cannot go in "new" tanks. I don't mean not cycled I mean they need mature tanks with lots of buildup of organic material!