I think it is not appropriate to list ETH as one of the most popular PoS coin in 2020 because it has not made its transition yet,
There might be a possibility for it to delay it again just like this month.
I think OP anticipating on the eth migration to POS blockchain that's why he mentioned its inclusion. Yeah it did set for 2020 the only thing we should know if its gonna be implemented. If yes, then its really a good POS blockchain cause many users hold eth even its still on POW blockchain.
OP was putting a big expectation to the ethereum as it will be offering a very good annual return to the stakers. I assume if OP is also seeing how big the daily trade volume in ethereum that makes more sense to put it into the list even if the transition is not yet happened.
Tron is not a POS coin, the ones i am so aware of are Ontology, stratis, neo, pivx, komodo, they are the best on my list because they aren't new projects, many new POS coins are scam projects
I should remind you that of PIVX is a masternode coin but with the help from the MN pool and even with a small amounts of coins and we're able to get the reward too but it looks like PIVX is also available for staking. But that's a dash fork coin.