A lot of Lazy Portfolios can fit your investor needs.
They can be implemented with few ETFs, and they need very little mainteinance (tipically, a rebalancing every year).
You can study the asset allocation of each of them and compare their returns and stats.
Compare portfolios
Ray Dalio All Weather vs Harry Browne Permanent Portfolio
Ray Dalio All Weather vs Stocks/Bonds 40/60 Portfolio
Warren Buffett vs US Stocks Portfolio
Technology vs US Stocks Portfolio
They are only few examples. Nativating the websites you can find more portfolios and compare them each other.
