I think I know where you're coming from, but most (luxury) designer items don't get replicated if the design is not too conspicious (I.E. someone who isn't into fashion as much won't recognise the brand, but probably will recognise the quality).
For luxury I'd say Hermès and Cartier are decent, as they don't put out their logos as much as e.g. Goyard, LV and Chanel.
When talking designers: Belgian designers (dries van noten, margiela, ann de meulenmeester etc.) are respectively safe, however I find that the quality of fabric they use are sometimes inferior. When also looking for quality you could try Ports 1961 or Ferragamo (but stay away from the anyhting conspicious such as the belts
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