There are hundreds of altcoins, not all of them are good. The best altcoins are more established altcoins such as Monero, Litecoin, Ethereum, Neo, and Ripple.
Even though the market is very bad and there is no Altcoin that is growing rapidly but from the coins you mentioned Ripple is a coin that has a pretty good increase. Riak has the potential to become the king of Altcoin and replace ETH.
In fact, many argue that if Ripple can compete with ETH sometime, and I consider it natural that people think so because Riplle is a coin with a good team.