Yeah, I think your stuck Bro.
When you try to delete that account does it say this account specifically needs to be on or just a Google account?
Maybe you can make another Google account and add it to the phone, then delete your old one then re-add it. *shrugs*
The factory wipe is really not too bad. I have done it a few times now. lol! Its pretty quick too. I mean minus having your apps installed your phone will be back up and running in 10/15mins.