For a classic and smoother negroni, try:
- 1.5oz gin (Tanqueray is fine, but I'd recommend Ford's)
- 1oz campari
- 1oz sweeter, less intense vermouth like Contratto Rossi or Dolin Rouge
If you want to use your Carpano, I really like this negroni variation called a Kingston that uses rum:
- 1.5oz Smith and Cross rum
- 1oz Campari
- 1oz Carpano Antica