Froggy's is the best you will get. Not smell free per se, but some people like the smell.
American DJ has scents that can be added. Pumpkin spice might be one of them. It likely isnt too compellingly different than the scented oils at the scent shop in the Mall, or the 'Diagon Alley' looking Witch supply store.

You could put a few drops of Frankincense and Myrrh in there, and chase off evil spirits just like in Church.... its your fog machine. I am suspicious of running the added scent stuff myself.