Ethereum should be the first on your list. Then just pick on these altcoins to add on your bag.
Elrond
Hacken
Binance coin im pretty sure these coins will give us huge profit when bullrun starts
Ethereum will be the first option for the people who had experience and who have little knowledge about cryptocurrency.I will suggest Ethereum to the new traders also. Now the market bump of Ethereum price validated my statement. You can use Binance, LocalCryptos, to buy of Ethereum at good price.
Ethereum absolutely should be among your list, no doubt there is more chance to make profit from ETH investment than others. As you above mentioned l would also suggest ETH to the new investors, that is why ETH is absolutely the best choice for the first experience and can make motivate you, because as l said there is more chance to earn a good profit from the investment. But no doubt ETH is a great choice for long term investing.