I feel like most of the game recommendations that have been given are just games that the people recommending them personally enjoyed, not games that would actually be good material for the stream in question.
Disco Elysium would be cool, but it's kinda long and convoluted with a lot of easily-overlooked things. It's my second-choice vote after Lost Records: Bloom and Rage, made by the same people that did Life is Strange- but that format may be played-out by now.
Trying to get him to play Balatro? Stellaris? Deadlock? Even if those games are fun to play, I don't think they really fit the vibe.