Some of this may sound like Blasphemy to the 1" p/gal crowd, but here's my take on it:
Overstocking depends on a couple of different things:
1) The load that the fish have on the BioFilter.
2) The amount of space that the fish need to swim around.
3) Territorial Requirements.
It's my experience with Embers that they have very little impact on the biofilter. Their impact in a healthy tank will probably be less then the excess food that they are given. That doesn't mean you can put 50 of them in your tank, but as far as the bioload goes 6 aren't going to matter.
Also Embers aren't very active either. Thier school will slowly drift around the tank, so room to swim isn't that large of a concern either.
Your Rummies will like to swim the length of the tank. The good news is that you don't have anything else competing for those swimming lanes.
Like FighterFish I'm concerned that the Rams may get territorial. They may not, but it's something to watch for. You don't want all of your fish to be harrassed by these two.
The Gourami... That is the biggest impact on bioload that you've got in this tank. Still you should be fine. My concern here is aggression with other fish. Gouramis can be bullies, and with Rams you may get some aggression. Still... it's just something to watch for.
Shrimp: No negative impact. Enjoy them as they'll help keep possible over-feeds in check.
The Corry. Like FighterFish said these really should be in schools. When I first started collecting I had 1 Corry. Then I got a larger tank, and the fish's personality totally changed. Corrys like to pal around with other corrys (Doesn't matter if they're the same kind or not). Again the good news is that you don't have anything else on the bottom to interfere with its swimming lane.
What kind of filter do you have, and are you planting the tank or going fake?
IMO if you're planting the tank, and have a decent filter then you can add 2 more Corries to give your 1 some friends.
Your stocking
amount doesn't concern me with what you have... It's the Rams and their potential to be territorial that causes any concern whatsoever.
That's my take on it. Good luck.