While not a POS coin, I think TaaS deserves an honorable mention here. TaaS is a blockchain investment fund and it pays out quarterly in Eth... I use that Eth to buy more Bitbean. Works nicely.
Nice. TaaS seems like a good investment to earn dividends each quarter. While it is not a PoS coin, the dividends earned with it can be used to invest into other Ethereum-based PoS coins like PoSToken and Accelerator Network Token. That way, you could multiply your earnings at a faster rate and build your way towards endless profits.
Thus, the best coins that you could buy right now (in addition to the ones I've mentioned in previous posts) are TaaS, PoSToken, and Accelerator Network Token. These three coins combined can help you reach a ROI within a short time frame if they maintain their price levels. Also, BitBean gives nice rewards and can used in conjunction with the earnings you make with these coins. I use BitBean most of the times, and the results are fantastic.
Stratis - good choice. You just have to install special pos wallet and transfer there your stratis coins. I have just 1000 strat and for 1 month i gain 2 coins. it is not bad! But i don't like that i have to keep the wallet enabled. So, im not very happy with it, but for most people it's not the problem.
The earnings are not bad, but unlike many PoS coins in existence, you'll need to leave your wallet open always to receive the reward. For those who don't have a constant internet connection or use laptops, it is very inconvenient to do such practice. However, there is a coin (if not the only one) that allows you to "stake" it without leaving your PC on always in a safe and secure way. Such coin is named NEM with its Delegated Harvesting feature that allows you to earn XEM coins via another node on the network without exposing your private key. Of course, it needs a minimum of 10,000 XEM and considerable amount of importance score to begin earning, but if you could achieve such requirements, then you'll be all set towards making endless profits for the long term.
Other PoS coins which rely on the Ethereum blockchain like PoSToken and Accelerator Network Token, may not need the wallet to be open always to begin staking. You just pay a single fee in gas (ether) to execute the coin's smart contract function and you'll begin earning right away with these coins even if your PC is off. So, in crypto land there is always a choice to make profit within a short time frame. Just my thoughts