Hey there! I love LGBT streamers, and I've got some suggestions:
Dragunair is a cool trans woman streamer - she does a lot of league of legends, and she's really energetic and fun to watch.
KittyKathee is a pro Overwatch player who is also a trans woman. She's super cool, mains supports, and has aim for days. She's french, so unless you speak french, the dialogue may escape you. But she's fun to watch regardless.
Also, hey, shameless plug incoming, but I'm a trans woman who streams games on Twitch. I've got a schedule and a growing community of fresh faces all the time. I play mostly Overwatch, but I branch out occasionally when I get a new game. My channel is called the Nikatine Stream. There's a lot of trashy 80's music and also I play a lot of Sombra, so be forewarned
Don't forget about the Twitch Community called LGBT, there's almost always someone streaming on that list.
Take care!