Even a Blue eye Lucy can be yellower with age than most people think. The amount of yellow a BEL picks up will vary from snake to snake.
A Super Fire (BlkEL) is whiter than BELs …but had to find without the random yellow spots.
The other option for whitest snake that you can get would be a ‘white wedding’. That combo is a spider pied. But that can have a noticable wobble. All spiders will have a wobble, but not every wobble is something we can see. Even if a spider does not have a wobble for the breeder, they can develop a more pronounced wobble due to stress or new environments.
This was a great comparison photo and convo regarding white BPs.