You’re a class act, Red Queen.
I really hope that any remaining characters are from both races and classes that are not represented in the game yet.
Even though it’s not ideal stat-wise, I’ve always loved the idea of dwarven monks.  I think a Dragonborn sorcerer also makes sense.
When i make a full custom group I like making my Orc a Cleric, however I kinda dont want a second cleric since we have shadowheart (although I would prefer multiples of all the classes like bg1/bg2) 
Barbarian  - X  Karlach 
Bard  -  
Cleric  - X  Shadowheart
Paladin - X Minthara
Ranger - X Minsc
Rogue - X Astarion
Sorcerer -  ?
Warlock - X  Wyll
Wizard -  X Gale
Druid - X Jaheira
Monk -  ? 
FIghter - X  Laezel 
I would like a Shorty monk or Sorc, but I think A Dragonborn later in Baldur's gate city would make a great Sorcerer 
Bard spoiler question 
Orc Monk could be a little weird? I dunno cant imagine a Strength based monk 
Orc Sorcerer could be cool.
Dragonborn monk could be alright
Dont really imagine Dwarfs as monks  or Sorcerers 
Gnome Sorcerer or monk would be fine
Halfling Monk Or  Sorc could be ok 
With Sorc being fairly Similar to wizard I guess its the least likely to be the new class
Bard is Most likely due to "spoilers"
Monk Would be what id be happiest about because it be a nice surprise to see something new in a race we are not expecting
Dragonborn monk could be most interesting for me, but id be happy with Gnome monk too