OK, that is fairly hard water, somewhere in the range of 15 to 18 dGH.
So, to the fish that will suit this. Livebearers obviously. Some of the Rainbowfish (Atherinids). Central American cichlids [not all our aggressive, as you mentioned not wanting aggressive fish]. A few of the Cyprinids and Characins.
Have a browse of our profiles under these categories, narrowing them down by the water parameters and then see what you think might work. Other members may suggest their favourites; I don't really have any, as all my fish are very soft water which is what comes out of my tap so those are my fish.