1. ETH - smartcontracts.
2. Monero - anonymity.
3. Byteball - DAG and just like it!

You have some very good choices. I would make some modifications though...
I would not include Ethereum, at least not before they bring a plausible solution to scale. And since the OP did not restrict the list only to altcoins, I would include the king of crypto:
1. Bitcoin: Best permissionless, borderless, censorship resistant cryptocurrency.
2: Byteball: Best scaling solution, built-in chat, bot store and conditional payments.
3. Monero: Best anonymity features.