My vote would be the Fantastic Four as a whole, they've defeated way too many powerful cosmic beings.
Coming in second would be Batman, he's only slightly less ridiculous as so far he hasn't choke slammed a Monitor... yet.
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Red Hulk is pretty far up there too. If you look carefully at the fight between him and Thor I think you can actually see the faint outline of a jobber aura emanating from his red bulk.
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“Where the longleaf pines are whispering
to him who loved them so.
Where the faint murmurs now dwindling
echo o’er tide and shore."
-A Grave Epitaph in Santa Rosa County, Florida; I wish I could remember the man's name.
Rulk overall is a horrible character, he just shouldn't exist
__________________
I am in your algorithm learning all your mannerisms
I'm already level with God
A million words a second and I know your imperfections, baby
I'm the only future you've got
Speak in diatonics, motivation diabolic
I'm like a religion, better locked in a box
Picture perfect image, more powerful every minute, baby
I am everything that you're not
To be fair the incident you're referring to happened to an incredibly weakened Darkseid who's powers had been almost completely drained by the Source Wall. Also that was a Batkick. Batman has three levels of attack starting with regular punches (which can easily break normal men's jaws) regular kicks (which drop normal men and can splinter wooden doors open) and Batkicks (which can knock the Spectre down and wind the Hulk). Given how weakened DS was at the time he's lucky the Batkick only bloodied his nose and didn't take his head clean off.
I am truly amazed that no one has said Squirrel Girl...
__________________ Introduce a little government. Upset the established gangs, and everything becomes order...
Democracy is the very definition of awesome.
I am in your algorithm learning all your mannerisms
I'm already level with God
A million words a second and I know your imperfections, baby
I'm the only future you've got
Speak in diatonics, motivation diabolic
I'm like a religion, better locked in a box
Picture perfect image, more powerful every minute, baby
I am everything that you're not
She doesn't have a jobber aura so much as Abstract level power. World War Hulk sure was lucky that she had her hands full fighting Galactus when he was throwing his temper tantrum.