Billy Budd has a good nicotine content, but it's not a "turn you green" kind of blend. I can smoke some pretty good sized bowls of BB with very little issue, but if you smoke it on an empty stomach Billy Budd can and probably will get you.
Here's some higher nicotine blends that I really enjoy, mostly because they have great flavor and just happen to be IMHO well done tobaccos.
Mac Baren - Old Dark Fired
Solani - Aged Burley Flake
Solani - Silver Flake
Gawith Hoggarth - Dark Flake - Fellow member Slide turned me onto this stuff and it's great. I would put this up there in strength with 1792 Flake. 1792 is much more of an acquired taste, Dark Flake is relatively devoid of any scent.
Esoterica - Stonehaven - Very similar to G&H Dark Flake, a tad bit sweeter and a little darker tasting but harder to find.
GLP -Haddo's Delight - this stuff is pretty strong. It gives me a pretty good nicotine buzz. Not a turn you green kind of buzz, but definitely a very relaxing body buzz. You gotta like Perique though.
Sam Gawith - 1792 Flake- Personally I think this stuff is not as strong as most people make it out to be. I really like it. It's unique and quite sweet. My wife actually likes the smell of it as well. It gives me a good nicotine buzz, but it's by no means overwhelming. I do however smoke smallish bowls of it, usually in a smaller cob and never on an empty stomach. Not a morning smoke!
All said and done, you can always smoke Four Brothers. I never have, but it has its following due to the very thing that your searching for. And as PipePuffer mentioned you can go with the English ropes for a little "ropa-dope."