I’ll throw my vote for Diablo 3. The game can be wicked addictive. I got the platinum trophy on PlayStation which was no quick feat. I just couldn’t stop playing. I would suggest choosing the Crusader to play as first. Super fun and has these flails that are specific weapons to his character. I had so much fun with the Akkhan armor set and the legendary flail called Fate of the Fell. Can take you well into the torment difficulty levels. Chef’s kiss of a game. I think people should really give it a chance if they like the Diablo style of game at all.
Yeah, but they aren't fun if you run into cheaters. They're a blast if you play with some of your friends. There are other similar games too, so I recommend you give the whole genre a shot.
I wouldn't recommend going as far back as the first one. Diablo 2 Resurrected came out last year and is a good starting point for the series if you're thinking about trying it out. I never got into 3, but so far 4 feels really good.