I think the strongest for me were Cognac&Cigars, Opium, and he also made a run for our Serbian forum (a scent I cannot define, very much perfume-like, but maybe Goran can say more).
For me though, personally, I like my citrus mix (lemon, orange, tangerine), my honey almond and my (somewhat bitter) sage the best. Those are pleasant, mild and clean.
The three "strongest scents" were not my thing, except maybe Opium. I use a mildly scented splash after my shaves, I will often use a nice EDT as well, so what the soap smells like isn't really a concern for me.