Is this even possible?
Doh sorry didn't fully read title. But i think some of my ideas my help.
No such thing as ota official Samsung android without touch wiz.
The best your going to do I guess is use Google Play Edition rom and do full unroot.
The other thing is maybe use aosp rom and full unroot or cyanogenmod and full unroot.
Anyway there are a few ideas for you.
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