Maybe not really a big one, but Mark Bussler's Classic Game Room was one of those OG game reviewers from when Youtube was new fangled thing. He was funny about every game, even when they were stinkers, and reviewed everything from old Atari obscurities to more modern console releases, and also possessed an impressive collection of classic games and systems and some arcade cabinets as well. Seems like it was all good for him, but I guess something was not going so well behind his cheery demeanor, because after many years of running his review show with apparent success, he made a decision to make it an Amazon exclusive.
This must've truly tanked his popularity, as last I've heard of him was that he had sold his massive collection and moved into comic book publishing.
Quite the sad way to go for a for a small but nonetheless notable YT legend.
Sigs are rather pointless, except if it's to showcase animation and images.