One word: Marabou
Comes from same country as Seraphim and there's not many "deluxe" chocolate products from them, but their "cheap market chocolate" products are definetly in the top rank of the market chocolates.
Daim is Marabou's trademark.
But as there was no Marabou chocolate available in the poll as decision I choose Toblerone.
I would take box of Toblerone bars with me in deserted island