I would avoid keeping them in pairs. Try just one, or three. That way, the aggression is non existent, or is divided among three separate fish. Two males will not swim together or buddy up. They will pick on each other constantly (unless you get two very docile ones).
I think you can keep one pearl gourami in a ten. They are not big swimmers and would fit relatively comfortably in a ten gallon, but I'm not sure how they'd do with all the other fish you are planning on.
I'd just get one dwarf gourami and add maybe a few smaller fish
BTW, the females are much less attractive than the males, in my opinion