Lufthansa & bmi offer the most generous allowances for paid first (300% flown miles with no status, 375% with status).
bmi have a quirk though - only 200% for SQ [Singapore Airlines] First.
SQ's PPS club lets you get status, while crediting miles to a more generous mileage program (e.g. Lufthansa's Miles & More). This means you get both lots of miles, and status with two airlines.
None of the Oneworld airlines are this generous. BA offer 200% of flown miles, while Qantas offer a lousy 150% of flown miles in First. Status bonuses mean top tier flyers will earn up to 250% in paid F (Not a jot on LH's 375%).
Regards,
Alex