Salsa Cromotos a my current favourites.
Surly forks I’ve had have always felt a bit ‘bangy and crashy’, a bit too stiff. (Instigator and 1×1)
Kona P2s were lovely in the older 395-420mm triple butted versions, but since they started beefing them up for disk brakes and 29er lengths they’ve lost their edge a bit, and after a pair of mine collapsed I got a pair of Cromotos, absolutely lovely, comfy, track well, and kill a fair bit of buzz.
Soma was the other one on my list but have never managed to actually get a ride on them so can’t comment.
There’s some looong 510mm 29er Charge forks availabel for cheap on eBay at the moment, could be worth a punt as < £50 but might not be anythign special.