With the prerelease of D4,almost all the attention has shifted from D2R to D4.Very few content creators have stayed (for the time being) with D2R.
If you enjoy watching twitch,i would highly recommend Piki1ki and Karakruxx.
Piki1ki is doing public runs you can freely join.
Karakruxx is our personal farming bot :) He has a very enjoyable stream with minigames and free item drops.At the end of the stream, he gives away the best items found on stream.