Ancalagon
Dusty Dragon
I definitely think direct damage spells are a no go. None of the rest of his kit contains it nor does it fit with the theme of creation and experimentation.
I'd rather see something like the following:
* Animate Objects
* Bigby's hand
* Creation
* Greater Restoration
* Passwall
* Telekinesis
* Teleportation Circle
* Wall of Force
I would agree with you but for one exception - cloudkill. If that's not an alchemist's spell... it totally fits.