It obviously depends strongly on the class you will play, though a 4 will hurt a lot, no matter where. Personally, I would do a Lore Oracle, with Sidestep Secret and Noble Scion (War), put the 4 in Dex an the 17 in Cha. The only thing aside from skills you use Dex for will be your CMD, which I think would be alright as a primary caster.
Would also gimp his initiative. Normally want to avoid if possible. Could always put it into Con and then apply an undead template
So I spent a bit making a sheet that shows all the creatures that can be chosen for alter self and what they have to offer as far as racial abilities you gain (darkvision, swim speed, natural attacks etc.).