A Martini with something in it — the Ford Cocktail: Old Tom gin, dry vermouth, Bénédictine, and orange bitters.
The Ray Long Cocktail, an elegant, absinthe-tinted brandy Manhattan: Cognac, sweet vermouth, absinthe, and Angostura bitters. If you want to put a spin on the original, this is the way to go.
Scotch whisky, lemon, honey, and ginger. Looks like a classic cold remedy to me. It also turns out to be one of the best Scotch-based cocktails going: the Penicillin Cocktail.
There are many versions of the Creole Cocktail. My favorite looks a lot like a Sazerac: whiskey, curaçao, and bitters, with a fragrant nose of absinthe.
Fino sherry, bianco vermouth, and orange bitters: the classic, light, aperitif Bamboo Cocktail, from the 1880s.