can you get a divider for it just incase you one of the gouramies goes at the other ones? I think it would be best to add the whole group of gouramies at once, then add the other fish a group at a time.
Example: first add the 6 gouramis, then the bottom feeders, then the bleeding hearts.
Also, make sure you have an LFS that will do trade ins and/or will acept donations should one of the gouramies start atacking the other fish. The divider will be used to seperate a gouami should it decide it doesn't like it's tankmates.