Good morning,
i own an E32 with regular electrical leather seats. In my opinion... it fits perfect. I'm 1,90m tall and have "3 fingers headspace" left.
I think its because of i have long legs and arms, (humans origin is definetly the ape

) thats why i can go down and back with the seat and the seatback but my arms still have the right angle to the steeringwheel and my feet are reaching the pedals comfortly.
Thats why i also fit well in my E34.