There's a list of some good tweeters, right here, -> https://www.influencive.com/top-blockchain-cryptocurrency-experts-follow-2017/ / https://99bitcoins.com/20-bitcoin-experts-you-should-following-twitter/

Also, look at some of the more popular crypto tweeters, and see who they are following, and follow those. They usually give good advice / updates. See for example, https://twitter.com/needacoin/following

And there are dozens more, you just gotta find the good ones.