My Potterverse characterizations have been warped by many years of reading fanfiction, so they may be more based on fanon than canon. I'm not sure I know the difference at this point.
Lucius would definitely wear Dorian, and Draco with his white blond hair and cold gray eyes smells like Ice Prince. And the Draco in my head loves a hot bath, so that works out well.
I have never come up with a good scent for Harry. Possibly Bonfire Night because I imagine adult Harry would be a beer drinker, and we know he likes treacle. And traveling by floo might leave you a little smoke scented.