Which characters power flunctuates the most

Spectre, Flash (Both Allen and West), Silver Surfer, Green Lanterns under Johns (Except his precious Green God that is Hal Jordan)

It's got to be beyonders
One minute 3 of them defeat LT
Next minute thor and hyperion can harm them/kill them
Just think about that power difference

Batman.
In his own comics he's struggling with ninjas.
In a JLA comic he's mixing it up with darkseid's minions.

Pre-crisis Superman