There are many other alcohols, 2M2B( https://en.wikipedia.org/wiki/Tert-Amyl_alcohol ) for example, which are "alcohol without the hangover" in a sense. I seem to remember a scientist looking into ways to deliver these alcohols(absorbed in cellulose IIRC). You'll note that these chemicals, like alcohol, can also lead to overdoses and since they are much more potent it is even more difficult to ensure one does not ove…
By categorizing an inventory of these trace alcohols and their effects, one could hypothetically create customized alcohols with varying effects and levels of metabolic load. These trace alcohols are also called fusel alcohols. A lot of these are very weird chemicals with varying effects, though, not all positive. Propan-1-ol is a fusel alcohol that is thought to be 2-4 times stronger that alcohol and similar in effects, but can lead to high anion gap metabolic acidosis as a lethal side effect. So there are likely safe maximum levels of each fusel alcohol that can actually be added. Fusel alcohols are something brewers take great care to avoid, after all, as they can cause many negative effects. There's something interesting there and I'm surprised no one has pursued this before(AFAIK)