I currently have 7 fish in my 75 gal. At the most I had 10 but the 3 blue/green chromis have all been picked off. So I guess in a way my tank has established its stocking level by attrition. I have no plans to add any more fish to this tank. Mind you, most of my fish are considerably larger than one or two inches. Among them is one Blue Devil Damsel and although he's caused some grief in the course of the past couple of years, I have no plans to remove him from the community. He's a striking electric blue colour which is one of the reasons I prefer to live and let live. He pretty much is outmuscled by most of the other inhabitants anyway and is in no position to cause any dire harm to the other fishes in the tank.
That's my experience and although I've never tried to run a 10 gal (I got the 75 used and that's how I started) I suspect that in the near future you're going to have some issues with those four fish in your system. The two clowns are probably going to be okay but I'd recommend you at least see about removing one of the other Damselfish. They're all nice and small now and apparently getting along, but every one of those guys is very territorial and in the limited space they are afforded now, with few hiding spaces for night time safety, that is going to cause stress and trouble in the future if not already. So even if the water parameters are pristine and other people apparently overstock their tanks and it's ok, that doesn't do anything for the well being of your fish. Yes one or two fish in a tank looks sparse, but the consequences of overstocking will become apparent in a short time or maybe a little longer, but it's pretty likely there will be consequences. Anyhow, best of luck and keep reading up/researching the hobby. I'd say a 20 or 30 gal would be a better solution if you wish to keep a few more fish.
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