If you need inspiration, start with Bernie Sanders's plan from his Medicare-for-all white paper or one of several considered by Elizabeth Warren (details here).
Households with enough assets to pay wealth taxes often try to get around them, by evading taxes (like hiding money in offshore accounts) or avoiding them (which is legally lowering the amount that is taxed). Economists Emmanuel Saez and Gabriel Zucman assume this is around 15 percent.
In 2016, this plan would've hit the richest of households and generated in additional revenue, which was of all wealth in the US and of GDP.
To put that into perspective, in 2016 it could've paid for each of the following:
In addition, it could've paid for these proposals: