Mitchum is very good. I've tried Driclor in the past but go gentle with it as it is very strong stuff.
Although it won't stop the sweat, washing with antibacterial washes such as Sanex or Carex can help make sure there is less bacteria etc... which might make it smell.
I find different clothing can make a difference too, I have certain tops which I find I sweat more in so might be worth trial and error there. I find keeping my feet cool helps keep my body cooler in general so footwear which allows your feet to breathe more might be an idea.