I have active shoal of 8 Harlequin Rasboras. Their only tankmate is a Rainbow Shark. Is there a Gourami or other fish that will be happy in my current community setting. Don't bother asking me the size of the tank. I just want to know what fish would be happy with the fish I currently have. I was looking at Opaline Gouramis, Paradise Fish, Even a male Betta.