Minsc and Boo would be a fun addition, even as just an NPC.
I don't think Us needs a specific DnD class tbh, there is room for companions that fall outside of traditional classes because they are monsters and have their own limited progression.
And yeah, one for each at minimum is good for me, but ideally and greedily I'd want a bunch more with repeats in classes, characters that are evil and good and have their own idiosyncrasies and specialties, I absolutely loved the volume of potential companions in BG and BG2, I know it'd be a lot of work but I really hope Larian is willing to do something similar to that...
