Hmm... If your going for a dark blend I would go with:
Timothys Coffee Extra Bold Parisian Nights
Caribou Coffee Mahogany
Caribou Coffee Sumatra
Coffee People French Roast
I also would probably go with that order as well. There are so many different types that it can be quite hard to narrow it down. If your looking for any good place to buy I really like
Coffee For Less.