>>13524973
Almost all vermouth recipes are similar to Manhattan, Negronis etc. The only one that is on the very sweet side and comes to my mind is the Blood and Sand which contains scotch (just buy a cheap blend like Johnnie Walker or Ballantines (whatever is on sale for 10-11€ atm), cherry liqueur (first try Eckes Edelkirsch for 6€ instead the expenisve and hard to come by Cherry Heering), sweet vermouth and fresh orange juice.
Another thing you could try would be utilizing more light, fruity or sweeter base spirits like cognac, rum etc. For example a Harvard, which is basically just a Manhattan that substitutes whiskey with cognac. Or a Vieux carre that contains cognac, whiskey, sweet vermouth, benedictine (not very common ingredient and kinda expensive, but hard to substitite), angostura and peychauds bitters. Peychauds are expensive af too in Germany and an uncommon ingredient too. Bitter Truth creole bitters are much cheaper. Maybe get one of those bitter truth travel sets and try those first before you buy big bottles.