At one point I wrote up an Alchemist who used a power that let him expend a spell slot instead of a potion. He had a bunch of utility potions he carried.
Lesser Restoration
Spider Climb
Touch of the Sea
Fly
Resist Energy
Water Breathing
Weapon of Awe
Oil of Stone Shape
Feather Step
Oil of Versatile Weapon
Barkskin
Stoneskin (It's a Summoner 3 spell, technically they could make a potion of it)