Larian went too far in making everyone so extra special and connected to the story. They completely omitted the backbone of any cast, the knight in shining armor, without any extravagant backstory or major condition. The down to earth good character that would have put all the evil and morally grey characters in context. The Ajantis or Edér of BG3. Or the light hearted adventurer who helps people they come across. The Coran of BG3, completely missing. Or how about the mercenary type who's not heavily invested in anything who's just trying to make their way, like Safana. A normal character who is cool simply because they are. There is no frame of reference. There's just a weird cast of edgy unusual characters who are competing who's the most edgy. With all of them being heavily involved in the story somehow against all odds.
And then of course the re-hashing of two old "good" companions from BG2. Which is a complete failure as well. The best way of doing justice to those characters would have been to NOT make them low level companions, again.
If you want generic characters then surely that is the role that mercenaries fill - the paladin in shiny platemail and other tropes? They won't have an extravagent background or major condition and you can have your party as you want. It is unclear when we will have access to them but I would be surprised if you cannot recruit some in the druid encampment in the full release. Personally I quite like that you don't have any dependable allies that you can completely trust but that you benefit from their help so keep them along (or keep them close by incase they transform and you need to kill them).