cybertron/gf scourge is probably #1 just off how crazy energon and cybertron scaling gets in general, and he’s one of the stronger characters in that show. Cybertron as a whole is by a huge margin the strongest tf animated series
I wanted to say Grand Scourge for 2 but looking back I actually can’t recall much he directly scales to? I had thought he was involved in more manga stuff but he was out of the picture before the really crazy manga feats show up. I know he fought Energon Optimus but idk at what point that’s supposed to be relative to the animation.
G1 Scourge is probably next if you go by the cartoon’s higher end feats.
ROTB Scourge next I guess. Cool character but by TF standards lower tier, as most movie transformers are
Cant recall anything BW Scourge did.