Try some black pepper oil for a throat hit. Or add more menthol, or citric acid. Most
ejuice (I know mine) has a more alkaline Ph, around 6.5, suposedly adding more acid = better throat hit, personally I don't care about that. Sounds too harsh and irritating to mucosa to me.
Grain alcohol (Everclear or Vodka) is gassed off as soon as heating begins, or probably long before that, would do nothing for TH. It is used mainly to dissolve extracts and absolutes or Ethyl Maltol for mixing in juice (to keep in suspension). Not for throat hits per se.
I do believe that anything above 190
proof would not be legally for sale, so "pure" ethanol may be a misnomer.