Another vote for Kim Justice, I especially appreciate the very British flavour of their content as it covers the more neglected systems from Amiga, Atari, etc. Their contributions to the gaming landscape are massively overlooked these days imo.
In a similar vein, I'd like to suggest Slopes Game Room (Daniel Ibbertson) and Nostalgia Nerd. They do great look backs on older gaming series and tech respectively.
For more deep dive gameplay breakdown content creators, the oft quoted Mark Brown (Game Makers Toolkit) can't be praised enough, and Hamish Black (writing On Games) has some fantastic videos on game narrative.