[MODS: Could you delete above message? Posting on my husbands laptop and didn't realize he was logged in under his name, lol]
I would suggest lowering the temperature in your tank, just in general. That might curb the aggression on him a bit too. There's no need to keep the tank at 84 degrees, they will breed anywhere in the mid 70's and up.
You did a large water change, but what were your parameters? What triggers breeding a lot of the time is a sudden rise in water quality. If your water quality was already perfect and you did a water change it's not going to have much of an effect.
Give them another week at least, then do another large water change.
I think part of what's happening here is you're expecting them to just get together and breed. That's not always the case, even with normally easy to breed cichlids. When you move them it can take months for them to get reaquainted and spawn.
Another thing is that you may be messing with the tank too much. Leave the divider in just for safety. Leave them alone for a couple of weeks (other than feeding), do a water change and see what happens.