Yeah except Natalya isn't Sheamus even compared to Divas... going off sizes for divas past and present I would make a men scale of something like...
AJ : Rey Mysterio
Natalya : Dolph Ziggler
Beth Phoenix : Sheamus
Kharma : Great Khali
Or something like that.
Also Daniel Bryan isn't quite big enough to come off as particularly menacing either so that comparison doesn't entirely help even if you are trying to sell off Natalya as Sheamus sized.
Like don't get me wrong I'm not saying AJ shouldn't come off as a threat to win matches. I'm saying she shouldn't come off as a threat to seriously injure people through psychotic beatdowns/escapades, which is kinda necessary for the crazy gimmick to work, even if they don't beat people down.
If Rey Mysterio went over the edge into madness I could totally buy him tearing Dolph apart if Dolph wasn't prepared.
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Thank you, Eddie Guerrero.
http://www.wwe.com/f/styles/photo_large/public/photo/image/2012/04/33_Moscow_04112012jg_02128.jpg