I would have voted RSAF Enfield if you had put it up there. They only made them in pre-war peacetime conditions and they were things of beauty with rust blueing and hand-fitted parts. Very few left today - ah well.
My heart says I should vote LB, but my head says 1941 production BSA. Except for a few early guns, LB made a "wartime expedient" variant of the No.4, while BSA initially produced No.4's to peacetime quality (before getting permission to toss fit and finish out the window) and built the MkI (no star) variant. They used beautiful European walnut initially and rust-blued the guns. LB used black walnut, a lesser breed of nut wood, and hot-caustic blued their guns. They also produced almost all their guns in the MkI* cheapened variant.
LB production is an easy 2nd place though - they next best maker (Savage) was well back of LB quality.