There is a scan saying Mxy is afraid of Manhattan, but he is FAR from the most powerful. That's kind of a tossup, besides Over-Monitor & Writer .
I have quite a few ( I have a LONG set of scans to support my statements . Yes some of these I made for fun ) :
" Pandora's feat of merging DC Comics , Wildstorm Comics, and Vertigo Comics is an outlier " . Boy seriously ? This was her ONLY feat back then. And her much weaker incarnation was stronger than the Deadly Sins, who each could destroy all of existence with but a blink of their eyes .
" Spectre's feat of being able to destroy all of creation was just a lie, and there are NO other feats to put him at such a level " . Uhmm... Wasn't that the Presence who said that ? He also has : other statements of power, and even a statement that put Spectre at being able to destroy all creation [ Omniversal via Author Statement, and it was referring to the weakened Spectre, as the quote was after New 52 ] as well, with NO amps at the time, merging with the Void, and the Source, and sending Dr.Fate to a realm beyond time & space , AND Dr.Fate having the ability to wield the power of Creation whenever he desired ( who Spectre is consistently portrayed as far superior to in ALL ways ) , but yet this is considered a lie ? What ?
( Now if we DID accept Spectre as 1-A, and Emperor Joker / Mxy capable of effortlessly curbing him, and they fear Dr.Manhattan, that could get him VERY far, but would lose to a lot of people.
" Lucifer Morningstar was weak because he was defeated by TITANS WEAKER THAN CRONUS " . Yikes. Hate to burst your bubble, but those guys had the power of the Presence at the time .
" Shi'va is the only God who is able to destroy the Sphere of Gods. So by this logic , the new form of SHAZAM is FAR WEAKER than his previous incarnation , because it's inconsistent and hard to rank. " . Uhmm... Way weaker ? Inconsistent ? Okay, but first lets get this bullcrap out of the way about Shi'va being the only God that had that level of power . There are so many I can name, but I will get the ones that matter the most .Oblivion Shadow was threatening all of existence. Vishnu could easily destroy all of existence by pulling on some flowers, she is a Martian God, and they fear the power of H'roneer a lot more than Vishnu. Guess where he is ? He's a part of SHAZAM . 1/6th of his current power is considered superior to Vishnu simply through scaling, not to mention Shi'va, whose feat of nearly destroying all of existence wasn't contradicted . Yuga Khan never mentioned the Source Wall directly when fighting SHAZAM , meaning in his quote he WAS referring to the Source itself, not the Source Wall, as the comics have definitely put conceivable effort to telling the difference. We also can't forget that the New God's energies , 3 of them, were able to push back the Source and split it into 2, which explains why it looks and acts weird, as they are different from the original. Half of 1-A is still 1-A, so these new God's showed a level of High 1-B to 1-A power, not to mention SHAZAM completely curbstomped Yuga Khan who 6 New God's powers , plus the living lightning , with only 4 of the parts of SHAZAM and added this amped Yuga Khan to his collection. All of this points to an ridiculously powerful SHAZAM compared to the original .