Single character playthrough/similar game?

Hey. So starting off, I know about lone wolf, I know that you should do at least 2 characters, but...

I love this game, I'm in a current playthrough with some friends, and we're starting Act 3 soon. However, it's hard to play all 4 together with the schedules of everyone. Is there something that ressembles DOS2, but like, with a single character? Turn based, dnd-like, different classes, but only on one character?

Thanks in advance:)