maybe the bottom bracket is knackered, you've removed and cleaned and replaced but that still doesn't take into account the BB might be knackered /. pedals spindles might be knackered
see which of these switches clears up the creak
otherwise a drop of oil around the knee and ankle areas might be required
swap pedals - ride
swap cranks - ride
swap bottom bracket - ride
maybe the bottom bracket is knackered, you've removed and cleaned and replaced but that still doesn't take into account the BB might be knackered /. pedals spindles might be knackered
see which of these switches clears up the creak
otherwise a drop of oil around the knee and ankle areas might be required