But here are some that stand out: Ethereum, Ripple, Dash, ZCash, Monero, NEO, Litecoin.
They're just good in the mean time. Look at coinmarketcap top 10 in recent years you could see why. So many has failed and vanished, the rest are scams. Litecoin is just a testnet for bitcoin and has no future ultility, clearly overpriced and so on,... I would recommend doing clear research on the coin roadmap to save your pot in the future and the safest bet is on enterprise coins such as DRGN. Of course there's always a chance someone comes up with the new gem, like bitcoin.