I have a couple of barbie heads that matched my Obitsu body very well - they were Barbie Basics heads and weren't the usually "barbie tan" color. I also match up Volks normal skin with obitsus, Volks skin is a gray tone while Obitsu's is a pinker tone, but it's usually hard to tell the difference unless you are incredibly particular.
Those are the only two other heads I've really tried on an Obitsu body! I'm interested to see what other answers there are.