@kekino Have you tried Toque Ambrosia? I wouldn’t call it quite coarse, but it is coarser, darker and moister than Toque Natural/Original. And a way stronger! Toque Peanut Butter is a little bit coarser, too (medium grind, actually; 25 g TPB tins now being sold for a very nice price at snuffstore.co.uk). Some snuffs in ToqueUSA line are on a Germanic style oiled medium grind base (ToqueUSA Citrus, Lime, Peach), Poschl fan might find them easier to take than most regular Toque snuffs.
Bernard Kownoer is a nice moist coarse snuff, but it is water based (doesn’t contain parafin), akin to SG Kendal Brown snuffs.
Gawith Hoggarth SP is the only moist and coarse SP snuff, but you must go for 25 g vacuum tin (steer clear of SG and GH in 10 g tap boxes!): http://snuff.me.uk/proddetail.asp?prod=GH-SP-25
There’s a really coarse and moist (approximating to rappee, hence somewhat messy, when fresh) Wilsons of Sharrow Best Dark snuff, dark and strong, bergamot scented thing.
Samuel Gawith SGM is coarse, medium moist mentholated snuff, fairly nice one, just had some easy sniff from the back of my hand.
Wilsons of Sharrow Singleton’s Super Cool is smokey, dark, coarse and moist mentholated wonder. Might be a pleasant surprise, not lacking in nicotine department this.
Wilsons of Sharrow Dr. Rumney’s Blue - medium coarse, medium moist, camphorated menthol with a hint of smokiness, but medium brown in colour. Low to medium nicotine.
V2 Thunder snuff (V2 'fine’snuffs are quite coarse, suited for taking from the back of the hand, just like Poschl snuffs) might match the grind you are searching, too. Mind you, all Thunder stuff is strong!
Available at snuff.me.uk and northerner.com (out of stock there now; I really hope V2 haven’t discontinued them, though I have a bad feeling - they disappeared from snuffstore.de completely…).
There are only four online shops for the EU consumer left: snuffstore.co.uk (widest assortment and lowest shipping price), snuff.me.uk (fast delivery, but higher shipping cost), northerner.com (huge mark-up, VAT on non-American tobacco products, some nasal snuffs might be stale there, particularly those from the discontinued WoS range); you can order from mrsnuff.com as well, but shipping price might be somewhat deal-breaking (unless there’s a free shipping promotion).