Hexblade is the best one-level dip in BG3, but Circle of Stars may be up there with Fighter as the best two-level dip, at least for a dedicated spellcaster. Playing a Wizard or Sorcerer? Archer Form ...
I've always been obsessed with rolling and re-rolling RPG characters, and Baldur's Gate 3 has been a beautiful catastrophe for me, letting me channel that energy into too many Tactician and Honour ...