Definitely Ethereum is the best coin for long term investment because it is second to bitcoin and the price is not near or close to bitcoin yet. So it still has a lot of room for growth. And it is more reliable than the other coins you listed. Its use case is also a factor to consider, as a lot of projects would still continue to adopt it.
Besides ETH (I’m not as confident about BTC as most people here), I think the safest coin that will be around for a long time is Monero (XMR). There is always a need for a truly private coin and Monero is currently the only one. So in my opinion Monero is the best coin for me to hold for long term.