I've pretty much looked at nothing else but BG3 content since October, and no one I've seen has found plate armor yet.
But Scale +1 or Gith Half-Plate plus a shield plus a spell will get your tanks to 21 AC, which is more than enough to survive most battles in EA.
PS: you could also just take Lae'zel as a companion then remove her armour, if you were less violently inclined.
