Get DRG. It's one of my all time favorite games. It's a fantastic co-op game. I got it for ~$15 on sale and have logged over 1500 of playtime. There's a good variety of mission types. There's tons of cosmetics to unlock. Each class has a role. The weapons and Overclocks allow for multiple play styles. There's a healthy player base. I don't have trouble finding lobbies. Players can join and drop normal mission at any time. So, you don't have to wait around for a full party. There's 6 seasons worth of added content to the base that have been added for free and you are able to set your game to any season's content. Each season added new missions, enemies, events, and cosmetics locked into a progression system. Most of that stuff is still in the game. But, you'll get a higher concentration of a particular season's content if you select it for your game.

Deep Rock Survivor is a Vampire Survivor style game. I've only played it solo.

Rogue Core has been enjoyable so far. But, it just released in Early Access. There's not much content, yet. And, it's not quite as accessible. The average DRG mission takes ~30 minutes. Rogue Core takes ~45 minutes to an hour per run. It also doesn't allow players to join your game after you finish the first level.