Assuming no multiclass and such, very likely Wood Elf Ranger just so I could replace that obnoxious addict Astarion for lockpicks/stealth/sleight of hand proficiency. Prefer this to Rogue as a whole, I don't know if what I see in EA will survive to launch, but you can cheese so hard with ranged attacks and stealth, it's ridiculous.
That's already level 3 Ranger there.
You can basically solo entire temple courtyard like this, by the time they even spot you - you killed half of them, after that you can just run off and hide and keep at it.
And you start with all this level 1 too with Wood Elf Ranger in BG3, they give you 2 proficiencies on top.
I've also just tried this but in keeping DEX and WIS high, INT and CHA are still too low to make use of any skills related to them.
I tried to make it so that all the skills in that list were DEX and WIS ones, but there is still some overlaps like with Arcana, in that case I guess just ignore Arcana and keep Gale for that.