According to CoinGecko's rankings https://www.coingecko.com/en
Some of the coins with the most potential are Golem, Lisk, Golem, EOS and IOTA

According to CryptoMarketSignal's rankings http://cryptomarketsignal.com/crypto-screener/ which has them by market cap segments:
Best of the Mid Caps: LSK, ZEC, XMR
Best of the Small Caps: VTC, WAVES
Best of the Micro Caps: NXT, GRS