What I observed in my playthroughts of ranger and druid in Baldur's and with my playthrough through Divinity OS2 is that making balanced party that is varied is much more harder with 4 party members.
I'm personally a player that wants varied party. Early in game you get cleric, rogue and wizard, exactly in that order. Now, in order to try druid class you have to recruit Lazariel, but I personally am not keen on kicking someone out of my party.