Alchemical Apprentice Robe from the grotto maybe, Quicksilver Cassock looks decent (The Six), Robe of Potency (Tempest), Dampened Robe
of Dissonance (Fathom), most of the others are just different color variations. Those are the more "not pajamas" ones that I can remember.
Nothing I can think of with stacks of potions. Only big bottle I can think of is the gourd on the Rakshasa Hide, but more of a jungle outfit.