I’m in a similar boat. I don’t know if you’ve heard the news, but it looks like some of the old D2 devs are now working on Darkhaven. It’s not out yet, but there’s hope!

Valheim and Raft are both fun with two people. Raft’s a bit janky but more relaxed. Valheim can be relaxing or as hard as you want to make it (there are world settings you can change and plenty of mods), and although it’s technically still in early access there’s a ton of content.