At this moment, i still not really sure about another coins beside Ethereum and Bitcoin.
Those two are irreplaceable choice, in therm of favorite coin. But if i had to choose, then i will choose Waves.
I think this is the best 2 coins in which you can safely invest , I would certainly be afraid to invest all your money in other altcoins , I'm in the Ethereum quiet , but if you think so then I would choose would be eos