My personal top 5 are:

1) ICON
2) EOS
3) IOTA
4) OMG
5) Ethereum

1,2 - I beleive them to be the nextgen Blockchain
3 - feeless, fast, minerless - great choice for the concept of Internet of Things
4 - Vitalik Buterin is an advisor of project. OMG goal is to connect fiat and crypto worlds.
5 - ETH haven't show it's potential yet.