St. Bruno Flake packs a punch. Not sure if you can get it in the US, however. I may be over-rating the nicotine a bit, but it's the only tobacco product ever to make me "retro-eat". A very pleasantly fruity, dark, moist tobacco with maybe a hint of the Lakeland sauce in it. It's an OTC in the UK but none the worse for that. The various ropes are high nicotine; I'd suggest the Black Bogie as the coolest and smoothest (goes under some other name in the US, I think). They can be quite rough. Aromatic Black Bogie has a bit of extra top to it - hard to say what exactly, but I've never heard anyone across the pond mention it so it may be unobtainable. So much nicotine in these that I can only manage a thimble-sized bowl at a time. Much talk of 1792 Flake on the forum. It is strong and full bodied, perhaps a bit too much so for me. My touchstone tobacco is Louisiana Flake. I typify it as 1792's younger, more athletic brother. I couldn't imaging smoking nothing but 1792 all day long; I have done this for weeks at a stretch with LF. These two are Lakeland sauced, however. Love it or loath it. I think it gets a bad start from the "soapiness" that people talk about. I see it as "creamy" or "unctuous" and have no problem with that.
I would have suggested snuff as it has some of the "ready to go" quality of chewing tobacco - it just sits in your pocket and just screams for repeat doses; no fuss, no fire. However, I detect that maybe you want to cut down on the number of vile habits you have rather than simply add another one. If it does appeal, Fribourg and Treyer High Dry Toast has a kick and is relatively plain. F&T Santo Domingo also can kick my ass with Vitamin N and Samuel Gawith Chocolate Snuff was a surprise Nicotine Monster - who would have suspected innocent chocolate of such treachery.
"Never keep up with the Joneses. Drag them down to your level." - Quentin Crisp
I happen to have some ten year old Haddo's Delight in a 2 oz. tin.
Well then there you go! Problem solved If you don't feel like crackin' into that well aged tin I might have some 3-4 year old Haddo's I can share with ya'. I think I have some old Escudo you can try too.
Five Brothers is a SOLID recommendation for high nicotine. I don't have any left over anymore though. Might be time to place an order. It is not a 'high brow' blend, but a very enjoyable one as a straightforward tobacco.
gawith Hogarth dark/brown flake packs a punch. Any rope will pack a punch. Also,from what i heard/ saw on youtube Dunhill nightcap is also a strong blend along with Purple Cow and Bow legged Bear . but Dark flake will knock you on your ass....