The only version of Flash who could possibly beat the beings on Batdudes list, ie the Superman family on down, and barring the all powerful from birth cosmic Gods, ie Galactus and Exitar on up is this version of the guy.
He runs as fast as he can, and as he begins to merge into the speedforce, Manhunter uses all his mental power to merge the last vestige of Wally's mind left on this plane into the semi-sentient consciousness of the speedforce, since he is mainlined to it.
Wally then becomes the master and controller of all kinetic energy, capable of stopping multiversal movement down to the level of protons and neutrons with a thought/synapsis.
And if the S shield starts to glow and we find out that kryptonians can still survive without their bodies functioning at any level, he hits him with the speedforce itself, causing SBP's very existence to implode, and rid the universe of a horrendous eyesore/character.
Wally has been stated to be the flash most mainlined to the speedforce. For him to become its master wouldn't be farfetched, as long as they explained the merging. The speedforce is the sum of all kinetic energy. Which is movement. Which covers things as big as planetary rotation, to things as small as the electrical synapses that power the brain. Anybody who controls kinetic energy, controls life, in truth. Flash becoming that being is believable in comic book science or logic. Superman, WonderWoman, GL or Thor not so much.
Flash is perfect for that role, and plausible as well. If he were to be shown to become that in the far and distant future, ie DC 1Million and a true Flash Prime or Flash Perfect, he'd be the most powerful being in the multiverse. Mind you, not the planes above or below it, like heaven and hell. Just the most powerful guy in the physical plane. Thats all.
That guy smashes a fair portion of that list with ease. I'd love to read a mini about him.