If you want a character built for you, and those are the limitations your DM put in place, then just say that.
from the Monster Manual gets Str -2, Dex +2, Con -2, Int +2. It's usually the go-to for a core-races Wizard build.
Command Undead automatically
gives you pseudo-permanent control of any mindless undead you happen to find. It doesn't have a very good chance of working on intelligent undead, considering it's a Will save effect and undead HD give good Will saves, so save it for the zombies and skeletons. You can recast it on a given creature every (CL-1) days to make sure they stay under your control indefinitely, and even (Lesser Metamagic Rod of) Extend it to cast it half as often on them.
I wouldn't make a necromancer out of a Wizard, I'd use the Dread Necromancer base class in Heroes of Horror. A Cleric with the Magic domain and a Wand of Command Undead makes a better necromancer than a Wizard.