Source: goodcomics.comicbookresources.com

8. Galactus/Darkseid

This is the only villain-centric crossover on this list, and boy is it an intense one.

In the story, the Silver Surfer enters the skies over Apokolips, searching for a new planet to feed to his master. After being swarmed by Parademons, the surfer summons Galactus, and they begin to work on exterminating Darkseid's minions. Surfer vs Orion is a particular high point, as is what comes afterwards. As Orion is near death, the Black Racer appears to claim him. The full page of the Surfer and the Racer seeing each other is weirdly powerful and beautiful, really a tribute to Jack Kirby at his finest.

Galactus arrives, and begins building his planet destroying machine, only for Darkseid to arrive to stop him. Darkseid unleashes everything he has, including his vicious omega beams, but none of it is enough. Galactus switches on his machine"¦only to find that Apokolips is already a dead planet, and will give him no sustenance. He asks Darkseid why, if he knew this, he fought so hard to stop him. Darkseid pretty much just shrugs. It’s a wonderful little moment where both big bads gain a modicum of respect for each other.

Solid book all around.