There are few danios compared to goldfish and I feed so heavily that it is not an issue. Most people want to know how the smaller fish have not been eaten, but my goldfish are so slow it isn't an issue.
Plants include: Amazon sword, radican sword, giant hygrophila, moss balls, tiger lotus, cabomba, moneywort, red ludwigia, anubias, vals, and many others. Swords are a really good bet.