I understand that you're looking for a signature fragrance. The thing is, the more you sample, the more you want to sample, and your journey to find the one and only fragrance will be slowed down.
I recommend you try : A*MEN by Thierry Mugler, Body Kouros by YsL, Burberry London by Burberry, Terre D'Hermes by Hérmes
In my opinion these have potential for a signature.