quill18 is a fun strategy game Youtuber/streamer that I enjoy watching. He's not the best strategically, but I find his personality and gameplay fun to watch regardless.
Matt Barton is an amazing channel if you love classic CRPGs or older PC games in general. He's had amazing interviews with the likes of John Romero, Chris Avellone, Brenda Romero, Robert Sirotek, George Ziets, Tim Cain, Robert Woodhead, and many, many more. He also occasionally does reviews for classic and modern CRPGs. This guy doesn't get anywhere near the traffic or recognition he deserves IMO.
Somecallmejohnny for great indepth looks at entire series including Sonic, Metroid, Castlevania, Pokemon, Mega Man, and many more. I rewatch a lot of his Johnny vs. retrospectives/reviews just because he's got a great personality and is fun to listen to.
CGQ+ is an offshoot channel of Classic Gaming Quarterly that focuses more on vlogs from Chris' life growing up in the 80's, and as well his streams for various classic console games from stuff like the NES, Genesis, Playstation, etc. I like this channel more mostly due to Chris' ability to pull me back into a time in my youth and hit those nostalgia notes really hard, but his game play streams are also fun and often informative. His main channel Classic Gaming Quarterly is also very interesting and educational. He does overviews of console launches (including insight on all launch games), and cool stuff like classic gaming magazine read throughs. Great stuff.