Don't lose any sleep over you overstocking.
OK... I KNOW I'm overstocked.. most of my fish are small, and I have plans for some as they grow out.. either distributing to friends or moving to another tank.
HOWEVER, i think people blow this "grow into the tank" out of proportion. Those Clowns may not exceed 6"...
There are a lot of things you can do with your fish... get a bigger tank, setup another.. sell them or trade them at the LFS when they start getting too big. The options are endless.. Why have an empty tank because of what may happen 2 years down the road. Not to mention you're basing everything on potential. My son has the potential to be 7' tall, but he could also be 5'3... My point is... do what you like.. if you have problems.. do something about it.
I have 7 Millennium Rainbows that I got cheap because they were so small. When they grow out, I can either keep them, sell them for a profit, or breed them and sell the fry... I haven't decided, but I still have PLENTY of time to decide this.
Therefore.. I'll tell you what's in MY tank... and I'll tell you that they are all happy and very active. I don't see agression or stress... water is clear and nice, and tests out well.. and my fish don't die!
60 gallon Community
1 x Eheim 2213 and 1 x Fluval 405
Heavily planted... NO CO2
7 x Boesmani
2 x Turquoise Rainbows
2 x Small Kissing Gouramis (Wifes fish... when they grow, I can talk wife into bigger tank...)
3 x Clown Loaches
2 x Corey Cats
2 x Blue Rams (I get the most comments on these guys)
1 x Krib
6 x Pristella Tetra
3 x praecox Rainbow
1 x Bristlenose Pleco (who does a great job)
Overstocked? I don't lose fish... and I don't get illnesses. And it looks NICE.
(of course, I also have 3 other active tanks(20l, 37 and 50) and have a 10, 20l and 40g that can be setup on short notice.)