There aren't really that many "classes" that can be added if we stick to the official material, since the artificer is pretty much the single one missing (and Larian went out of its way to give some of its primary strengths to everyone else, given that attunement isn't a thing etc).
Which is why I spoke specifically about subclasses and races. This is the area where they'd have more room for maneuver.


Party control in Baldur's Gate 3 is a complete mess that begs to be addressed. SAY NO TO THE TOILET CHAIN