Samuel Gawith's Full Virginia Flake is my nr 1.
Close 2nds are Capstan Blue Flake, Dunhill Flake and Amphora Virginia. I'll put Dunhill Royal Yacht in here as well, although I don't compare it to the above mentioned blends at all, with all its strength and boldness. Well, it's a virginia blend.
I also like Fribourg & Treyer Golden Mixture, Vintage and Cut Blended Plug, and Mac Baren's HH Pure Virginia.