Characters who can destroy the earth by themselves?

By equipment: Thor, Beta Ray Bill

By strength: Superman, Classic Drax, Worldbreaker Hulk, Gladiator, Champion with Power Gem, Blue Marvel (potentially)

By energy/force blast: Any Herald of Galactus (Silver Surfer displayed this more than others), Thanos, Nova, Genis-Vell, Black Bolt

By magic: Classic Dr. Strange (he could even destroy galaxies), Dr. Fate, Captain Marvel, Odin, Zeus, Dormmamu, Zom, Shuma-Gorath

By intellect/invention: Reed Richards, Dr. Doom, Tony Stark, Forge, Lex Luthor

By telekinesis: Phoenix, Nate Grey and Cable (theoretically)

By various means: Galactus and any cosmic hierarchy

Gambit it would take some time though

By equipment: Thor, Beta Ray Bill, Green Lantern, Atrocitus, Agent Orange

By strength: Superman, Classic Drax, Worldbreaker Hulk, Gladiator, Champion with Power Gem, Blue Marvel (potentially), Chaos KingHercules, Doomsday

By energy/force blast: Any Herald of Galactus (Silver Surfer displayed this more than others), Thanos, Nova, Genis-Vell, Black Bolt, Blue Beetle, Gambit, Darkseid

By magic: Classic Dr. Strange (he could even destroy galaxies), Dr. Fate, Captain Marvel, Odin, Zeus, Dormmamu, Zom, Shuma-Gorath

By intellect/invention: Reed Richards, Dr. Doom, Tony Stark, Forge, Lex Luthor, Batman

By telekinesis: Phoenix, Nate Grey, God Cable

By various means: Galactus and any cosmic hierarchy

@BringnIt

Flash can thunder clap? And move at a billion times the speed of light?