The Bourbon County Stout is pretty overrated. They do a great job of hyping it up tho. Their barleywine is awesome as well as the coffee stout. Here are some of my favorite stouts
St. Peter's Cream Stout - Great English Stout that is a benchmark beer for me.
Bell's - Kalamazoo is a solid stout, but unremarkable compared with some of their others. Cherry, Double Cream, Java, Expedition (imperial), Black Note (which I haven't had, but it's on everyone's wish list)
Cigar City - Marshall Zukhov's which is a legend. Haven't tried Hunahpu, but it's supposed to be one of the best beers out there.
Left Hand - Milk Stout is a solid stout
Wells and Youngs - Double Chocolate Stout, Courage Russian Imperial Stout
Founders - Breakfast Stout & their Imperial stout
Terrapin - Wake n Bake for sure and the MooHoo Stout is a nice lighter stout
Dogfish Head - World wide after it's been aged a bit. Chicory Stout is a nice lighter stout, but I think it's draft only now.
Nogne Brewere - Dark Horizon is ridiculous
Brooklyn - Black Chocolate Stout
Le Coq - Extra Double Cream Stout
Mikkeller - Breakfast Geek, Black Hole, and another one with a black dude with an afro on the label
Great Divide - Yeti Series
Samuel Smith - Imperial Stout, chocolate stout is good for a dessert type drink
Avery - Mephistophele's
I'm sure I missed a few that I've liked, and plenty more I haven't tried yet.