If you ask best ICO in here all bounty hunters will recommend their signatures ICO's. My opinion is do your own research about ICO's. I have small ICO list I hope it will be helpful for you. GoNetwork, TraDove, NEX, Credits, Sapien and Current. If you wanna do your own research this site also helpful for you.
https://icobench.comGood luck!
I like Credits.
https://credits.com/en you can check this out. you can find many advantages of Credits that you haven't ever known before, in terms of transaction volume, execution speed, and cost.