Once your tank is cycled, another bulletproof fish to start out with is endler's livebearers. Again, get only males or you'll be hip deep in fry, but they are smaller, and in my experience, hardier than guppies. You don't get the huge fan tails, but you get bright colors in dabs all over the fish, with a high metallic shine that catches your eye from across the room. Buying 5 males means they will all try to outshine each other in color displays, so the fish will stay bright, but that's about the limit of agression from Endler's.
Combine that with a 3 pack or so of playfull cories, and you'll have an active little community tank. But cycle first!