What two frags have you tried?
I love strong pepper notes and can't say that I get anosmia from pepper - Molton Brown Pepper cologne disappears very quickly, but that's not anosmia it's just a weak and disappointing cologne. Both Penhaligon's Opus 1870 and Blenheim Bouquet are great long lasting frags with a strong pepper note and Lauren Polo Sport Extreme is also very good, again no anosmia problem with that.
There aren't many frags that I get anosmia with and no individual notes I'm aware of that kick it off for me. In fact the only frag I can think of that I've ever had anosmia with is VC&A Tsar.