Remus
He smells of coffee, old books, wolfsbane potion (especially when close to his time of the month. It smells bitter and dark) and of chocolate.
Sirus
He smells like wine, slightly like a dog, his shampoo which is vanilla smelling (He takes pride in his hair) and of dust (because his house is dusty man).
Snape
Snape smells of coffee, old books, strange potion ingredients (He could one day smell sweet and another day could smell like burnt chicken) and his shampoo (Because unlike book Snape, this Snape washes his hair. His shampoo smells woody).
Lucious
Lucious smells of whiskey, leather, his cologne (its smells woody and deep) and dust (Because like Sirius, Lucious' house must have that old dusty smell).
Xeno
Xeno smells of parchment, coffee, Dirigible plums (they smell quite sweet) and of grass.
Yaxley
Yaxley smells of coffee, his cologne (it's quite musky and strong), leather and whiskey.