Mid Player to Watch via Twitch?

Watch Valkrin, without a doubt the most educational stream I've watched. Dude's very chill and unsalt.

There's a lot but not all of them will really teach you, you can watch valkrins broadcasts from earlier days, he does play mid talon and velkoz a lot, or you can watch him play support velkoz which after laning phase breaks down is basically mid koz anyway. But the information he gives you about how to view different situations in the game is what he's great at, and that applies no matter what role you are.