I've been doing some research over the past few weeks and I found a website called Midas Investments. When I first found it they were paying up to 30% on ETH and a lot on BTC as well, currently they are still paying 23% on ETH. They seem pretty legit and have solid reviews on TrustPilot.
I guess it's not really staking, maybe more like yield farming, but I didn't see it on the list in that website.
At the moment cake is the best option for staking in my opinion, price is already low and its good time to buy ,also platform is making good and useful updates for example adding ethereum chain , you can also stake and use it easier from your mobile using this new app: download link
You don't need to use a special website or platform to earn high staking rewards. You can stake ICP for up to 20% APY in their website. A lot of POS projects let you stake in their wallet, like Celo for example.