ARK or Blocknet, no doubt. One of these will probably be $1+ billion market cap.
Shift if you want to be more speculative, it has a lower cap and smaller team, so it's more risky but there's potential for 100x gains after few years if the decentralized web/storage takes off (which is what I'm betting on).
No doubt these three are your favorites my friend. Not without good reason too. They've all made considerable gains. Especially blocknet.