As I understand it, you're asking: which cuban cigars can be most readily identified as cuban cigars, in terms of appearance and flavor. Given your past posts, it seems likely that you're looking for good "display" smokes for professional purposes. I'll split it into multiple categories to boil down to a single answer.
1) Band. For most rookies, band is the first thing they notice. I'd say the best-known cuban bands are Montecristo, Romeo y Julieta, H. Upmann, Cohiba, El Rey del Mundo, and Hoyo de Monterrey. Unfortunately, all of the above have US name-alikes. There's a reason for that.
2) Vitola. Thinner vitolas are more common on cuban cigars, whereas the trend has been going to larger ring gauges in NC's. In the blind cigar review thread, I sent a Partagas Mille Fleurs, a mareva 5x42, as my unbanded stick. This might have given it away from the get-go. Suffice to say that a mareva is a very common cuban size and a very uncommon non-cuban size.
3) Cigar: Cuban tobacco seems to have a characteristic earthy-barnyard scent, which is rarely the case in non-cubans. This is partly due to their aging process (they don't) and partly due to the tobacco itself. The french say that terroir matters in wine; who's to say that it doesn't matter in cigars?
To sum it up, which brand-size combo is going to be most distinctive for you.
1) Montecristo No. 2. Also A, No. 4, Edmundo, and Petit Edmundo. But No. 2 is first and foremost.
2) Cohiba Siglo V. Also Esplendidos (larger) or Siglo IV (smaller).
3) El Rey del Mundo Choix Supreme.
4) Partagas Serie D No. 4.
5) H. Upmann Magnum 46. H. Upmann was JFK's favorite cigar, a bit of historical trivia for you.
I have a ton I love so far though, so it is tough to narrow them down.
