If you like chartreuse and want something in a similar vein, I'd highly suggest Strega, an Italian herbal liqueur often stocked on the same shelf as chartreuse.
Easy to find Kahlua alternatives; it’s a coffee liqueur and that’s not hard to find.
A little more challenging to find a Campari or Cocchi Americano alternative. There are lots of similar options and it’s not obvious whether an aperitif liqueur is a substitute for Campari or Aperol, for example.
Nice to know what the Chartreuse alternatives are.