In reply to drolex:
The lovely boulder circuit at Stanage Apparent North includes The Real 20ft Crack. Way better than its polished, unjammy namesake at Burbage.
Unfortunately jamming bouldering is hard to come by. If you're prepared to go a bit higher, there are plenty of short cracks along Curbar, e.g Start of The Affair buttress and next to The Mask. The Sheep Pit finishes up a highball jamming crack with a rather slopey top and somewhat unsettling landing. Dog Leg is the one of the best jamming boulder problems around (but easy).
The wonderful Highland Cow Baslow circuit it the BMC guide cheekily includes a cracking VS crack which is tough at the top, jammy, and even less like a boulder problem than the rest of the circuit.